Cfn-lint

Fixes
- Update exceptions in rule [E1029](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1029) to include `BuildSpec` (pull [1444](https://github.com/aws-cloudformation/cfn-python-lint/pull/1444))

Features
- Switch DB Instance Engine check from [E3030](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3030) to [E3040](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3040) so the comparison is case insensitive (pull [1441](https://github.com/aws-cloudformation/cfn-python-lint/pull/1441))
CloudFormation Specifications
- Update CloudFormation specs to 11.6.0 (pull [1433](https://github.com/aws-cloudformation/cfn-python-lint/pull/1433))
- Add `ruby2.7` to supported list of ruby runtimes (pull [1436](https://github.com/aws-cloudformation/cfn-python-lint/pull/1436))
Fixes
- Update regex in rule [E1029](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1029) to be more optimal and not hang on large strings (pull [1430](https://github.com/aws-cloudformation/cfn-python-lint/pull/1430))

Features
- Update SAM Translator package to 1.21.0 (pull [1406](https://github.com/aws-cloudformation/cfn-python-lint/pull/1406))
- Update rule [E3027](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3027) to check that either Day of Month or Day of Week is a question mark (pull [1405](https://github.com/aws-cloudformation/cfn-python-lint/pull/1405))
- New rule [E3029](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3029) to check `AWS::RDS::DBInstance` `Aurora` databases don't have certain properties (pull [1409](https://github.com/aws-cloudformation/cfn-python-lint/pull/1409))
- Build a resource graph for checking circular dependencies (pull [1391](https://github.com/aws-cloudformation/cfn-python-lint/pull/1391))
CloudFormation Specifications
- Update Exclusive and Only One specs to include additional rules around Security Group Rules (pull [1407](https://github.com/aws-cloudformation/cfn-python-lint/pull/1407))
- Update CloudFormation specs to 11.5.0 (pull [1416](https://github.com/aws-cloudformation/cfn-python-lint/pull/1416))
- Patch spec so that TTL is Long on Route53 Change Record Sets (pull [1417](https://github.com/aws-cloudformation/cfn-python-lint/pull/1417))

CloudFormation Specifications
- Update CloudFormation specs to 11.4.0 (pull [1403](https://github.com/aws-cloudformation/cfn-python-lint/pull/1403))
Fixes
- Properly display yaml parse errors when the error was a tab (pull [1402](https://github.com/aws-cloudformation/cfn-python-lint/pull/1402))

Features
- Define an initial Docker file (pull [1361](https://github.com/aws-cloudformation/cfn-python-lint/pull/1361))
CloudFormation Specifications
- Update CloudFormation specs to 11.2.0 (pull [1390](https://github.com/aws-cloudformation/cfn-python-lint/pull/1390))
- Add allowed values for `AWS::RDS::DBInstance` `Engine` (pull [1398](https://github.com/aws-cloudformation/cfn-python-lint/pull/1398))
Fixes
- Update rule [E3039](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3039) to properly filter down attributes before checking values (pull [1392](https://github.com/aws-cloudformation/cfn-python-lint/pull/1392))
- Update rule [E1019](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E1019) to not join GetAtt if they aren't strings (pull [1389](https://github.com/aws-cloudformation/cfn-python-lint/pull/1389))
- Consolidate region and spec information into singular item (pull [1357](https://github.com/aws-cloudformation/cfn-python-lint/pull/1357))

CloudFormation Specifications
- Update CloudFormation specs to 11.1.0 (pull [1380](https://github.com/aws-cloudformation/cfn-python-lint/pull/1380))
- Patch specs from updated SSM and pricing data as of 2020.02.21 (pull [1380](https://github.com/aws-cloudformation/cfn-python-lint/pull/1380))
- Update AWS Config supported types to those active on 2020.02.20 (pull [1378](https://github.com/aws-cloudformation/cfn-python-lint/pull/1378))
Fixes
- Update condition logic to return dict_node instead of the standard dict node (pull [1375](https://github.com/aws-cloudformation/cfn-python-lint/pull/1375))
- Fix `--update-specs` on Windows to have the appropriate seperator (pull [1371](https://github.com/aws-cloudformation/cfn-python-lint/pull/1371))
- Update the documentation for `--update-documentation` (pull [1374](https://github.com/aws-cloudformation/cfn-python-lint/pull/1374))