FileInfo:
1.  Updated the DeleteSync() method to call _fs.chmodSync on the filepath to ensure that it is not read-only.
2.  Added CreateSync([mode]) method for creating a file synchronously.

DirectoryInfo:
1.  Updated the DeleteSync() method to call _fs.chmodSync on the filepath to ensure that it is not read-only.

Other:
1.  Bumped the patch version in package.json
2.  Added a FileInfo unit test for creating and deleting empty files (read-only and non-read-only files)