Review of the 8.x-3.x branch (commit 6a3cf4f):
- Bad line endings were found, always use unix style terminators. See https://www.drupal.org/coding-standards#indenting
./README.txt: ASCII text, with CRLF line terminators README.txt
- No automated test cases were found, did you consider writing PHPUnit tests? This is not a requirement but encouraged for professional software development.