Support for MQTT resubscribe (2)

s2n -> 4675f78 (2019.09.13) (#84)

0.3.0 failed to deploy.
We believe we've fixed the AL2-ARM machine that failed.
Bump version and try again.

Also update dependencies;
s2n -> 4675f78 (2019.09.13)
aws-c-mqtt -> v0.4.10

Support for MQTT resubscribe

MQTT Resubscribe (#82)

MQTT changes:
- added `mqtt.Connection.resubscribe_to_existing_topics()`
- `clean_session` flag is no longer ignored
- interrupted/resumed callbacks take additional `connection` arg
- Detect when server rejects the subscription

HTTP changes:
- `HttpStream.completion_future.result()` returns status_code instead of None 

Update dependencies:
- aws-c-common v0.4.12
- aws-c-io v0.4.12
- aws-c-mqtt to v0.4.9

fix python 2 build.

v0.2.28

fix python 2 (#81)

Updates to latest aws-c-* libraries.

Update dependencies to latest (#80)

* aws-c-common v0.4.12
aws-c-io v0.4.11
aws-c-mqtt v0.4.7

* adapt to API spelling change

v0.2.26

Update version in setup.py (#71)

Fixed elasticurl, improved tls options, fixed legacy compiler builds.

v0.2.25

tests for TlsConnectionOptions, alpn_list is now actually a list (#69)

Updates against latest master revision for the common runtime packages.

ClientTlsContext tests and rename-o-rama (#68)

The arguments to these functions confused me so I renamed them.

Updated dependencies and deployment pipeline

Switched deployment scripts to use release format tags instead of… (#54)

* Switched deployment scripts to use any release format tags instead of annotated tags on master

* Added aws-c-compression to manifest

* Disable caching on pip installs

Bug fixes and stability improvements

v0.2.18

Updated to v0.2.18 (#53)

Bug fixes and stability improvements

Update dependencies (#52)

* Added aws-c-compression @ v0.2.2

* Updated aws-c-common to v0.3.13

* Updated aws-c-io to v0.3.13

* Updated aws-c-http to v0.2.18

* Updated aws-c-mqtt to v0.3.8

* Updated aws-c-cal to v0.1.5

* Added aws-c-compression to setup.py

* Removed redundant build of native module

* Fixed linker ordering