Adds the following features:
- Add support for Dart and Mocha JSON test results (#404)
- Speed up composite action by caching PIP packages (#418, #422)
- Speed up package installation by always installing wheel package
- Pin versions of all transient dependencies so that composite action always uses the same versions (#421)
- Speed up parsing large TRX files by adding lookup index (#417)
- Restrict XSLT permissions used for non-JUnit XML files (#415)
- Add explicit number typing to XSLT (#416)