Log Message:
p5-CGI-Fast: update to 2.12.

2.12 2016-11-22
    [DOCUMENTATION]
    - tweak docs about overriding STDIN due to interference with POST
      requests (GH #16, thanks to melak)

2.11 2016-11-17
    [FIX]
    - make sure we use CGI::Carp as we depend on it (GH #15, thanks to melak)