Function isSubpath

isSubpath(options?): boolean
Returns whether the given filepath is a sub-path to the given base path.
Parameters
- Optional options: {
  basepath?: string;
  filepath: string;
  }
  Options.
  - Optional basepath?: string
    The base path to test against filepath; default is CWD.
  - filepath: string
    The path to test from basepath.
Returns boolean
Is filepath a sub-path of basepath.