v0.12.0

Bug Fixes

• jsii: Validate overriding does not affect optionality (#549) (8c826c1)
• python: parameter names in docstrings should be snake_case, not camelCase (#539) (a91a315)

Features

• jsii: enforce enum member names to be ALL_CAPS (#541) (c88080d), closes awslabs/aws-cdk#2287
• jsii-diff: extend reporting options (#547) (719be24)

BREAKING CHANGES

• jsii: Enum members are now expected to be ALL_CAPS