3.2.0

Release 3.2.0

- Switched from PSR-2 to PSR-12
- Added roave/security-advisories & squizlabs/php_codesniffer as dev requirements
- Switched from LGPL to ISC
- Switched from Travis to GitHub actions
- Added CODE_OF_CONDUCT
- Added issue templates
- Added pull request template
- Switched from BMC to GitHub sponsors

- Applied small bugfixes
- Fixed some spelling issues