message: Change error message for unsupported regexp flags.
diff: @@ -253,7 +253,7 @@ class Path {
  };
  } else if (pattern instanceof RegExp) {
  if (/[^i]/.test(pattern.flags)) {
  - throw new TypeError('Given RegExp flags not supported');
  + throw new TypeError('Only /i RegExp flag supported');
  }
  return {
  [filterSymbol]: true,
  