Log Message:
Update to 1.502
Update LICENSE

Upstream changes:
1.502 2021-01-19T10:17:29Z
        * freshen distro, dump Travis CI, add Github Actions

1.501 2020-09-30T04:50:46Z
        * Added create_plist_from_string()
        * Merged Tom Wyant's code to handle CF$UID types
        * A few more things emit warnings if they don't get the right type
        * $XML_{head,foot} are now subroutines

1.413 2018-03-22T18:51:07Z
        * Update to Artistic License 2.0

1.412 2017-07-30T18:27:33Z
        * Fix for plist files with comments (bram.stappers@tiobe.com) RT #122466
        and GitHub #5 (as a pull request)
        * Note that this module does not handle ASCII or JSON formats (but they
        are in the wishlist now) (anonymous Yahoo! user)