Log Message:
py-ruamel-yaml: Update to 0.16.5

pkgsrc changes:
 - Remove dependency to py-typing, no longer needed since version 0.14.9
 - Reset USE_LANGUAGES, C parts were splitted in py-ruamel-yaml-clib and a C
   compiler is no longer needed

Changes:
[0, 16, 5]: 2019-08-18
  - allow for ``YAML(typ=['unsafe', 'pytypes'])``

[0, 16, 4]: 2019-08-16
  - fix output of TAG directives with # (reported by `Thomas Smith
    <https://bitbucket.org/%7Bd4c57a72-f041-4843-8217-b4d48b6ece2f%7D/>`__)

[0, 16, 3]: 2019-08-15
  - move setting of version based on YAML directive to scanner, allowing to
    check for file version during TAG directive scanning

[0, 16, 2]: 2019-08-15
  - preserve YAML and TAG directives on roundtrip, correctly output #
    in URL for YAML 1.2 (both reported by `Thomas Smith
    <https://bitbucket.org/%7Bd4c57a72-f041-4843-8217-b4d48b6ece2f%7D/>`__)

[0, 16, 1]: 2019-08-08
  - Force the use of new version of ruamel.yaml.clib (reported by `Alex Joz
    <https://bitbucket.org/%7B9af55900-2534-4212-976c-61339b6ffe14%7D/>`__)
  - Allow '#' in tag URI as these are allowed in YAML 1.2 (reported by
    `Thomas Smith
    <https://bitbucket.org/%7Bd4c57a72-f041-4843-8217-b4d48b6ece2f%7D/>`__)

[0, 16, 0]: 2019-07-25
  - split of C source that generates .so file to ruamel.yaml.clib
  - duplicate keys are now an error when working with the old API as well