Re-release: Fixes for Raspberry pi

This is a re-release of what should have been v1.5.11 which did not have the right tag name.

• Fix missing files in source distribution. This should fix the release on piwheels.org.
• Reduce amount of memory needed to compile. This should fix installs from source on older Raspberry Pis.

Updated Greengrass IPC client

• Updated Greengrass IPC client (#172)
• Updated MQTT to configure protocol operation timeout (#171)
• Update docs (#163)

EventStreamRPC connect ack bug fix

• New pypi wait strategy (#157)
• Updating dependency to pick up event stream RPC client fix. (#162)

awscrt 0.10.7

v1.5.6

latest-awscrt (#158)

MQTT on-message callback has more info

• MQTT on-message callbacks have new qos, retain, and dup args. This is a backwards-compatible change.

• Allow custom credentials providers via awscrt.auth.AwsCredentialsProvider.new_delegate()

Greengrass v2 IPC Connection and Sample

v1.5.4

Greengrass v2 IPC Connection and Sample (#144)

Greengrass IPC client support

• Added Greengrass IPC client
• Added EventStream RPC capability

Fix python 3.8, 3.9, and aarch64

• BUGFIX: update to awscrt 0.9.10, the previous version was missing wheels for python 3.8 and 3.9 on Linux x86_64, and missing all Linux aarch64 wheels.
• BUGFIX: MQTT CONNACK with error code results in failed connection.
• BUGFIX: Fix X-Amz-Security-Token bug in HTTP request signing.
• BUGFIX: Fix ecc signature verification failures under certain cases on Windows.

Updated to v0.9.3 of Python CRT

Updated to v0.9.3 of Python CRT (#117)

• Updated to v0.9.3 of Python CRT

Remove Python 2 support

• MAJOR CHANGE: Remove support for Python 2, Python 2.7 was end of life Jan 1, 2020.
• MAJOR CHANGE: Stop releasing wheels for Python 3.4, which was end of life in 2019.
• DOCS: Update docstrings, publish docs to https://aws.github.io/aws-iot-device-sdk-python-v2/