Gem update (#533)

* update gemspec and travis

* update for latest ruby

* rubocopping

Author: v0dro

.travis.yml

@@ -2,11 +2,8 @@ language:
   ruby
 
 rvm:
-  - '2.0'
-  - '2.1'
-  - '2.2'
-  - '2.3.0'
-  - '2.4.0'
+  - '2.5.1'
+  - '2.7.1'
 
 matrix:
   allow_failures:
@@ -22,10 +19,7 @@ script:
   - bundle exec yard-junk
 
 install:
-  - if [ $TRAVIS_RUBY_VERSION == '2.2' ] || [ $TRAVIS_RUBY_VERSION == '2.1' ] || [ $TRAVIS_RUBY_VERSION == '2.0' ];
-      then gem install bundler -v '~> 1.6';
-      else gem install bundler;
-      fi
+  - gem install bundler
   - gem install rainbow -v '2.2.1'
   - bundle install
 

daru.gemspec

@@ -27,10 +27,8 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency 'backports'
-
   # it is required by NMatrix, yet we want to specify clearly which minimal version is OK
-  spec.add_runtime_dependency 'packable', '~> 1.3.9'
+  spec.add_runtime_dependency 'packable', '~> 1.3.13'
 
   spec.add_development_dependency 'spreadsheet', '~> 1.1.1'
   spec.add_development_dependency 'bundler', '>= 1.10'
@@ -47,23 +45,17 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'gsl', '~>2.1.0.2'
   spec.add_development_dependency 'dbd-sqlite3'
   spec.add_development_dependency 'dbi'
-  spec.add_development_dependency 'activerecord', '~> 4.0'
+  spec.add_development_dependency 'activerecord', '~> 6.0'
   spec.add_development_dependency 'mechanize'
   # issue : https://github.com/SciRuby/daru/issues/493 occured 
   # with latest version of sqlite3
-  spec.add_development_dependency  'sqlite3', '~> 1.3.13'
+  spec.add_development_dependency  'sqlite3'
   spec.add_development_dependency 'rubocop', '~> 0.49.0'
   spec.add_development_dependency 'ruby-prof'
   spec.add_development_dependency 'simplecov'
   spec.add_development_dependency 'gruff'
   spec.add_development_dependency 'webmock'
 
-  if RUBY_VERSION < '2.1.0'
-    spec.add_development_dependency 'nokogiri', '<= 1.6.8.1'
-  else
-    spec.add_development_dependency 'nokogiri'
-  end
-  if RUBY_VERSION >= '2.2.5'
-    spec.add_development_dependency 'guard-rspec'
-  end
+  spec.add_development_dependency 'nokogiri'
+  spec.add_development_dependency 'guard-rspec'
 end

lib/daru.rb

@@ -5,7 +5,6 @@ def jruby?
 # :nocov:
 
 module Daru
-
   DAYS_OF_WEEK = {
     'SUN' => 0,
     'MON' => 1,
@@ -96,7 +95,6 @@ def error msg
 require 'daru/version.rb'
 
 require 'open-uri'
-require 'backports/2.1.0/array/to_h'
 
 require 'daru/index/index.rb'
 require 'daru/index/multi_index.rb'

lib/daru/configuration.rb

@@ -1,13 +1,11 @@
 module Daru
   # Defines constants and methods related to configuration
   module Configuration
-
     INSPECT_OPTIONS_KEYS = [
       :max_rows,
-
       # Terminal
-      :spacing,
-    ]
+      :spacing
+    ].freeze
 
     # Jupyter
     DEFAULT_MAX_ROWS = 30

lib/daru/dataframe.rb

@@ -2122,7 +2122,7 @@ def to_h
     end
 
     # Convert to html for IRuby.
-    def to_html(threshold = Daru.max_rows)
+    def to_html(threshold=Daru.max_rows)
       table_thead = to_html_thead
       table_tbody = to_html_tbody(threshold)
       path = if index.is_a?(MultiIndex)
@@ -2143,7 +2143,7 @@ def to_html_thead
       ERB.new(File.read(table_thead_path).strip).result(binding)
     end
 
-    def to_html_tbody(threshold = Daru.max_rows)
+    def to_html_tbody(threshold=Daru.max_rows)
       threshold ||= @size
       table_tbody_path =
         if index.is_a?(MultiIndex)

spec/core/merge_spec.rb

@@ -112,7 +112,7 @@
       expect(@left.join(@right, how: :outer, on: [:name])).to eq(answer)
     end
 
-    it "performs a left outer join", focus: true do
+    it "performs a left outer join" do
       answer = Daru::DataFrame.new({
         :id_1 => [2,3,1,4],
         :name => ["Monkey", "Ninja", "Pirate", "Spaghetti"],

spec/dataframe_spec.rb

@@ -4037,6 +4037,21 @@ def create_test(*args, &_proc)
         |  12   1   1   1
         |  13   1   1   1
         |  14   1   1   1
+        |  15   1   1   1
+        |  16   1   1   1
+        |  17   1   1   1
+        |  18   1   1   1
+        |  19   1   1   1
+        |  20   1   1   1
+        |  21   1   1   1
+        |  22   1   1   1
+        |  23   1   1   1
+        |  24   1   1   1
+        |  25   1   1   1
+        |  26   1   1   1
+        |  27   1   1   1
+        |  28   1   1   1
+        |  29   1   1   1
         | ... ... ... ...
        }.unindent}
     end

spec/fixtures/matrix_test.csv

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 describe Daru::IO do
   describe Daru::DataFrame do
     context ".from_csv" do

spec/io/io_spec.rb

@@ -113,7 +113,7 @@
     end
   end
 
-  context "#round", focus: true do
+  context "#round" do
     it "rounds to precision" do
       df = Daru::DataFrame.new({
         a: [1.3434,2.4332,5.6655,12.3344,32.233],