Pynamodb

What's Changed
* Fix exception message by ikonst, pauliokas in https://github.com/pynamodb/PynamoDB/pull/1157


**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.3.4...5.3.5

What's Changed
* Propagate null_check to maps in lists by ikonst in https://github.com/pynamodb/PynamoDB/pull/1128


**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.3.3...5.3.4

What's Changed
* Allow handling an exception raised when retrieving the first item by ikonst in https://github.com/pynamodb/PynamoDB/pull/1121


**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.3.2...5.3.3

What's Changed
* Do not package typing_tests by musicinmybrain in https://github.com/pynamodb/PynamoDB/pull/1118

New Contributors
* musicinmybrain made their first contribution in https://github.com/pynamodb/PynamoDB/pull/1118

**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.3.1...5.3.2

What's Changed
* Connection: call describe_table as needed by ikonst in https://github.com/pynamodb/PynamoDB/pull/1114
* Upgrade to mypy 0.950 by ikonst in https://github.com/pynamodb/PynamoDB/pull/1116


**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.3.0...5.3.1

What's Changed
* Do not call DescribeTable for models by ikonst in https://github.com/pynamodb/PynamoDB/pull/1095

**Full Changelog**: https://github.com/pynamodb/PynamoDB/compare/5.2.3...5.3.0