3.5.1

• Improve API and export types (#758) @badsyntax
• Run codeql on java 11 (#755) @badsyntax
• Bump junit from 4.13 to 4.13.1 (#751) @dependabot-preview
• Test on Java 15 (#752) @badsyntax
• Improve CI cache (#750) @badsyntax
• Improve CI workflow (#749) @badsyntax