Upgrade awscrt to version 0.5.11

Update awscrt to version 0.5.11. Improvements include:

• MQTT improvements
  • Fix on_connection_resumed callback's return_code argument.
  • Reduce default duration between MQTT keep-alive pings.
  • Drop connection if server CONNACK takes too long.
• Fix crash-on-exit which was common on Windows.
• GCC 8 support

More wheels, fix samples

• Update awscrt dependency, now has wheels for aarch64 and Python3.8
• Fix samples
  • MQTT connection interrupted/resumed callbacks took wrong args
  • Greengrass sample works with python 2

Fix deployment scripts.

Fix deployment scripts (#29)

* Fixed deployment test scripts.

* Actually increment the version number.

GA of python-v2 sdk

Ga time (#28)

* Updates to latest CRT, move to kwarg style arguments, update readme for GA.

Using latest awscrt

use latest awscrt (#27)

Update to `awscrt` 0.3.3

Adapt to API changes:
- HTTP API:
  - had an extreme makeover, but that only affects the implementation of Greengrass Discovery, not its API.
- MQTT API:
  - The Future returned by `subscribe()` now contains a `QoS`. It used to contain `None`.
  - `on_connection_interrupted` and `on_connection_resumed` callbacks have an extra `connection` argument.
- IO API:
  - `override_default_trust_store_from_path()` arguments renamed

Fixed CD pipeline, plus previous bug fixes

v0.2.9

bump

v0.2.8

Version bump for CI publish attempt

v0.2.7

Bug fix for raw bytes being passed to json load from string.

Bug Fix

Bug fix for raw bytes being passed to json load from string

0.2.5

Fix for Python 3.5