ESLint rules for JavaScript comment annotations.

• all-caps enforces comment annotations all-caps style

  // These comments will fail
  // todo:
  // todo
  // fixme
  //  fixme
  
  // These comments will not fail
  // TODO:
  // TODO
  // FIXME

• single-colon enforces comment annotations colon

  // These comments will fail
  // todo
  // fixme
  //  fixme
  
  // These comments will not fail
  // todo:
  // fixme:
  //  fixme:

• no-extra-space disables extra space in comment annotations (TODO and FIXME)

  // These comments will fail
  // to do
  // fix  me
  //  fix       me
  
  // These comments will not fail
  // todo
  // fixme
  //  fixme