diff --git a/poetry.lock b/poetry.lock
index 6928090..54d4966 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,19 +1,18 @@
 [[package]]
-category = "main"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.4.0"
 
 [[package]]
-category = "main"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "19.3.0"
+description = "Classes Without Boilerplate"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
 
 [package.extras]
 azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
@@ -22,53 +21,53 @@ docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "main"
-description = "Screen-scraping library"
 name = "beautifulsoup4"
+version = "4.9.1"
+description = "Screen-scraping library"
+category = "main"
 optional = false
 python-versions = "*"
-version = "4.9.1"
 
 [package.dependencies]
-soupsieve = [">1.2", "<2.0"]
+soupsieve = [
+    ">1.2",
+    "<2.0",
+]
 
 [package.extras]
 html5lib = ["html5lib"]
 lxml = ["lxml"]
 
 [[package]]
-category = "main"
-description = "Foreign Function Interface for Python calling C code."
-marker = "platform_python_implementation == \"CPython\" and sys_platform == \"win32\""
 name = "cffi"
+version = "1.14.1"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.14.1"
 
 [package.dependencies]
 pycparser = "*"
 
 [[package]]
-category = "main"
-description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
 name = "colorama"
+version = "0.4.3"
+description = "Cross-platform colored terminal text."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "main"
-description = "Coroutine-based network library"
 name = "gevent"
+version = "20.6.2"
+description = "Coroutine-based network library"
+category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-version = "20.6.2"
 
 [package.dependencies]
-cffi = ">=1.12.2"
-greenlet = ">=0.4.16"
-setuptools = "*"
+cffi = {version = ">=1.12.2", markers = "platform_python_implementation == \"CPython\" and sys_platform == \"win32\""}
+greenlet = {version = ">=0.4.16", markers = "platform_python_implementation == \"CPython\""}
 "zope.event" = "*"
 "zope.interface" = "*"
 
@@ -77,25 +76,23 @@ dnspython = ["dnspython (>=1.16.0)", "idna"]
 docs = ["repoze.sphinx.autointerface", "sphinxcontrib-programoutput"]
 monitor = ["psutil (>=5.7.0)"]
 recommended = ["dnspython (>=1.16.0)", "idna", "cffi (>=1.12.2)", "selectors2", "backports.socketpair", "psutil (>=5.7.0)"]
-test = ["dnspython (>=1.16.0)", "idna", "requests", "objgraph", "cffi (>=1.12.2)", "selectors2", "futures", "mock", "backports.socketpair", "contextvars (2.4)", "coverage (<5.0)", "coveralls (>=1.7.0)", "psutil (>=5.7.0)"]
+test = ["dnspython (>=1.16.0)", "idna", "requests", "objgraph", "cffi (>=1.12.2)", "selectors2", "futures", "mock", "backports.socketpair", "contextvars (==2.4)", "coverage (<5.0)", "coveralls (>=1.7.0)", "psutil (>=5.7.0)"]
 
 [[package]]
-category = "main"
-description = "Lightweight in-process concurrent programming"
-marker = "platform_python_implementation == \"CPython\""
 name = "greenlet"
+version = "0.4.16"
+description = "Lightweight in-process concurrent programming"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.4.16"
 
 [[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.7.0"
+description = "Read metadata from Python packages"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.7.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -105,20 +102,20 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
-category = "main"
-description = "iniconfig: brain-dead simple config-ini parsing"
 name = "iniconfig"
+version = "1.0.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [[package]]
-category = "main"
-description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
 name = "lxml"
+version = "4.5.2"
+description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, != 3.4.*"
-version = "4.5.2"
 
 [package.extras]
 cssselect = ["cssselect (>=0.7)"]
@@ -127,86 +124,84 @@ htmlsoup = ["beautifulsoup4"]
 source = ["Cython (>=0.29.7)"]
 
 [[package]]
-category = "main"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "8.4.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "8.4.0"
 
 [[package]]
-category = "main"
-description = "nose extends unittest to make testing easier"
 name = "nose"
+version = "1.3.7"
+description = "nose extends unittest to make testing easier"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.3.7"
 
 [[package]]
-category = "main"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "20.4"
+description = "Core utilities for Python packages"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.4"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "main"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "main"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.10.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.9.0"
 
 [[package]]
-category = "main"
-description = "C parser in Python"
-marker = "platform_python_implementation == \"CPython\" and sys_platform == \"win32\""
 name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.20"
 
 [[package]]
-category = "main"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.7"
 
 [[package]]
-category = "main"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "6.0.1"
+description = "pytest: simple powerful testing with Python"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "6.0.1"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 more-itertools = ">=4.0.0"
 packaging = "*"
@@ -214,114 +209,103 @@ pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa_mypy = ["mypy (0.780)"]
+checkqa_mypy = ["mypy (==0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "main"
-description = "Extensions to the standard Python datetime module"
 name = "python-dateutil"
+version = "2.8.1"
+description = "Extensions to the standard Python datetime module"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
-version = "2.8.1"
 
 [package.dependencies]
 six = ">=1.5"
 
 [[package]]
-category = "main"
-description = "World timezone definitions, modern and historical"
 name = "pytz"
+version = "2020.1"
+description = "World timezone definitions, modern and historical"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2020.1"
 
 [[package]]
-category = "main"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.15.0"
 
 [[package]]
-category = "main"
-description = "SleekXMPP is an elegant Python library for XMPP (aka Jabber, Google Talk, etc)."
 name = "sleekxmpp"
+version = "1.3.3"
+description = "SleekXMPP is an elegant Python library for XMPP (aka Jabber, Google Talk, etc)."
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.3.3"
 
 [[package]]
-category = "main"
-description = "A modern CSS selector implementation for Beautiful Soup."
 name = "soupsieve"
+version = "1.9.6"
+description = "A modern CSS selector implementation for Beautiful Soup."
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.9.6"
 
 [[package]]
-category = "main"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.1"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.10.1"
 
 [[package]]
-category = "main"
-description = "tzinfo object for the local timezone"
 name = "tzlocal"
+version = "2.1"
+description = "tzinfo object for the local timezone"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2.1"
 
 [package.dependencies]
 pytz = "*"
 
 [[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "3.1.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "3.1.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [[package]]
-category = "main"
-description = "Very basic event publishing system"
 name = "zope.event"
+version = "4.4"
+description = "Very basic event publishing system"
+category = "main"
 optional = false
 python-versions = "*"
-version = "4.4"
-
-[package.dependencies]
-setuptools = "*"
 
 [package.extras]
 docs = ["sphinx"]
 test = ["zope.testrunner"]
 
 [[package]]
-category = "main"
-description = "Interfaces for Python"
 name = "zope.interface"
+version = "5.1.0"
+description = "Interfaces for Python"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "5.1.0"
-
-[package.dependencies]
-setuptools = "*"
 
 [package.extras]
 docs = ["sphinx", "repoze.sphinx.autointerface"]
@@ -329,9 +313,9 @@ test = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 
 [metadata]
-content-hash = "4c11472dbf2c4758a2a851828aceaee0136b787b40247810a53adb9ae4103a3c"
-lock-version = "1.0"
+lock-version = "1.1"
 python-versions = "^3.7"
+content-hash = "4c11472dbf2c4758a2a851828aceaee0136b787b40247810a53adb9ae4103a3c"
 
 [metadata.files]
 atomicwrites = [
@@ -469,6 +453,8 @@ lxml = [
     {file = "lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:8f0ec6b9b3832e0bd1d57af41f9238ea7709bbd7271f639024f2fc9d3bb01293"},
     {file = "lxml-4.5.2-cp38-cp38-win32.whl", hash = "sha256:107781b213cf7201ec3806555657ccda67b1fccc4261fb889ef7fc56976db81f"},
     {file = "lxml-4.5.2-cp38-cp38-win_amd64.whl", hash = "sha256:f161af26f596131b63b236372e4ce40f3167c1b5b5d459b29d2514bd8c9dc9ee"},
+    {file = "lxml-4.5.2-cp39-cp39-manylinux1_i686.whl", hash = "sha256:6f767d11803dbd1274e43c8c0b2ff0a8db941e6ed0f5d44f852fb61b9d544b54"},
+    {file = "lxml-4.5.2-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:d15a801d9037d7512edb2f1e196acebb16ab17bef4b25a91ea2e9a455ca353af"},
     {file = "lxml-4.5.2.tar.gz", hash = "sha256:cdc13a1682b2a6241080745b1953719e7fe0850b40a5c71ca574f090a1391df6"},
 ]
 more-itertools = [
@@ -489,8 +475,8 @@ pluggy = [
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
 py = [
-    {file = "py-1.9.0-py2.py3-none-any.whl", hash = "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2"},
-    {file = "py-1.9.0.tar.gz", hash = "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"},
+    {file = "py-1.10.0-py2.py3-none-any.whl", hash = "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"},
+    {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
 ]
 pycparser = [
     {file = "pycparser-2.20-py2.py3-none-any.whl", hash = "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"},