Update to 3.0222
    
    - New upstream release 3.0222
      - Fixed documentation of decode for unicode noncharacters
      - Added correct code to warn as in core
      - No replacement, ignore warnings when in relaxed mode
      - We used a wrong range too, but the wrong code from 3.0220 was never
        executed because of an coding error (GH#73, GH#74)
      - Fixed a perl 5.6 compilation regression from 3.0220
      - Improve decode_bom for multibyte encoding, but not yet enabled
      - Fix refcount error
      - Add 5.24 to travis tests
      - Enable decode_bom for multibyte encodings UTF16 and UTF32
      - Encode internally to UTF-8