Version bump, add AWS_DEFAULT_REGION env variable

Fix mutable types for thatway, version patch update

Version bump 1.2.1, move news fragments to changelog

Merge branch 'releases/1.1.x' into main

Move news fragments to changelog

Move news fragments to changelog

Merge branch 'releases/0.9.x' into main

Moved changes to changelog

Merge branch 'releases/0.9.x' into main

Change development header to "About the Project"