Update changelog for 0.5.2

Update changelog for 0.5.1

add regression test for teal-language#121

Closes teal-language#121

Update changelog for 0.4.2

Update changelog for 0.4.1

Update changelog for 0.4.0

CHANGELOG.md: add changes for 0.3.0 release

tests: add another test case for invalid record extension

rename compat53_recursion to skip_compat53