v80

• Change Maven Wrapper validation from build-failing error to warning when properties file is missing (#268)

v79

• Add Maven Wrapper validation with clear error message when required files are missing (#266)

v78

• Fix a buildpack crash when determining Maven version that can occur for some configurations. (#264)

v77

• Refactor Maven installation and invocation code (#257)
• Improve error messages with detailed troubleshooting guidance (#257)
• Enhance settings.xml handling and error reporting (#257)
• Buildpack output slightly changed. If you match against the buildpack output, verify your matching still works and adjust if necessary. (#257)

v76

• Remove heroku-20 support (#245)
• Buildpack output slightly changed. If you match against the buildpack output, verify your matching still works and adjust if necessary. (#249)

Prepare release v75 (#230)

* Prepare release v75

* Update CHANGELOG

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Co-authored-by: heroku-linguist[bot] <136119646+heroku-linguist[bot]@users.noreply.github.com>
Co-authored-by: Manuel Fuchs <manuel.fuchs@salesforce.com>