Update to 1.27

Upstream changes:
1.27      2021-05-07 04:54:31 -0600
  - Production release identical to 1.26_01
1.26_01  2021-04-27 05:15:20 -0600
  - Fix bug in test where test files sometimes didn't have
    execute permissions (gh#31)
  - Add Env as an explicit test prereq (gh#13, gh#32)

1.25_01  2021-04-25 07:35:41 -0600
  - Tests should now work when Perl isn't in the PATH (gh#29, gh#30)

Upstream changes:

(wen)