Update to 6.36

Upstream changes:
6.36      2022-01-05 14:39:42Z
    - Fix examples in HTTP::Request::Common synopsis: HTTP::Request::Common
      does not put headers in an arrayref, unlike HTTP::Request (GH#170) (Karen
      Etheridge)
    - Update to contributing information (GH#171) (H奪kon H脱gland)

6.35      2021-11-11 22:10:31Z
    - Clarify documentation for decoded_content (GH#166) (Eric Wastl)

6.34      2021-11-08 14:27:36Z
    - Catch case of empty name/value in header words split. (GH#168) (Galen Huntington)

(wen)