message: Clean up `.gitignore`
diff: *~
  -*.map
  -packages/**/*.js
  -!packages/**/webpack*.js
  -extensions/**/*.js
  -extraterm/src/**/*.js
  -!jest.config.js
  -
  dist/
  .vscode/
  @@ -15,24 +8,4 @@ __pycache__/
  build_tmp/
  docs/_site
  node_modules/
  -
  -!extraterm/src/main_process/pty/PtyConnectorFactory.js
  -!extraterm/src/dirname.js
  -!extraterm/resources/extra_icons/build.js
  -!packages/extraterm-boolean-expression-parser/src/*.js
  -!packages/extraterm-boolean-expression-parser/src/test/*.js
  -
  -packages/extraterm-extension-api/main.d.ts
  -packages/extraterm-web-component-decorators/Decorators.d.ts
  -packages/extraterm-event-emitter/main.d.ts
  -packages/extraterm-readonly-toolbox/main.d.ts
  -packages/extraterm-uuid/main.d.ts
  -packages/extraterm-shell-string-parser/main.d.ts
  -packages/extraterm-shell-string-parser/test/MainTest.d.ts
  -
  -
  -packages/extraterm-readonly-toolbox/test/MainTest.d.ts
  -packages/extraterm-web-component-decorators/test/DecoratorsTest.d.ts
  -packages/extraterm-web-component-decorators/test/TestCode.d.ts
  -packages/extraterm-trim-between-tags/main.d.ts
  -packages/extraterm-resize-notifier/main.d.ts
  +docs/.sass-cache
  