Log Message:
Update to 6.22

Upstream changes:
6.22      2020-02-24 18:58:07Z
    - Full release.  No changes since TRIAL release 6.21

6.21      2020-02-19 14:35:09Z (TRIAL RELEASE)
    - Bump Encode to latest version (3.01) (GH#129) (Olaf Alders)
    - Revert #115 (GH#131) (Olaf Alders)
    - Revert (GH#125) "try hard to make a usable file name" (GH#130) (Olaf
      Alders)
    - Fix JSON request encoding examples in POD (GH#126) (Michael Schout)

6.20      2019-02-05 01:46:39Z (TRIAL RELEASE)
    - Fix encoded file names when LC_ALL=C (GH#125) (Lars Dɪᴇᴄᴋᴏᴡ \ 
迪拉斯)

6.19      2019-01-16 15:17:35Z (TRIAL RELEASE)
    - Add support for RFC 8187 encoded filenames (GH#115) (Zaki Mughal)
    - Fix memoized _uri_canonical #121 (GH#123) (Dorian Taylor)
    - Don't overwrite $@ in decodable (gh #80) (GH#118) (mschae94)
    - Add support for RFC 8187 encoded filenames (GH#115) (Zaki Mughal)