message: Docs: add information about --passWithNoTests flag
diff: @@ -218,6 +218,10 @@ changed in the current repository. Only works if you're running tests in a
  git/hg repository at the moment and requires a static dependency graph (ie. no
  dynamic requires).
  +### `--passWithNoTests`
  +
  +Allows the test suite to pass when no files are found.
  +
  ### `--projects <project1> ... <projectN>`
  Run tests from one or more projects.
  