Log Message:
p5-Test-Spec: update to 0.53.

0.53 Wed Aug 16 09:49:00 BST 2017
  - POD links are clickable
    Contributed by @manwar (issue #42)

0.52 Tue Aug 15 10:20:00 BST 2017
  - Pass example instance to each test
    Contributed by @jamhed (issue #30, #41)
  - Fix runtests to run all examples that match any of the patterns
    Contributed by @mpw96 (issue #37, #38)
  - Ensure META.json includes requirements
    Reported by @joelrebel (issue #39)