Release v0.3.1900000300

What's Changed

• Remove compiled JS content by @stuartleeks in #210
• Retain run-main.js/run-post.js by @stuartleeks in #213
• Update tag to use generated version number by @stuartleeks in #214
• Workflow tidying by @stuartleeks in #216
• Add missing 'v' prefix on release/tag by @stuartleeks in #217
• Update docs to point to v0.3 release by @stuartleeks in #218
• Pass env vars to devcontainer up by @stuartleeks in #211
• Re-enable running subset of tests in forks by @stuartleeks in #220

Full Changelog: v0.2...v0.3.1900000300