Log Message:
Update to 1.21

Upstream changes:
1.21  2018-10-06 MANWAR
      - Patched issue RT# 67061 (handle warning uninitialsed value).

1.20  2018-10-05 MANWAR
      - Merge pull request #4 from jjatria/302-found, changing the
        name of 302 statuses from Moved to Found.

1.19  2018-10-04 MANWAR
      - Merged pull request #3 from jjatria/max-age, which sets max-age
        attribute correctly from constructor.

1.18  2018-10-03 MANWAR
      - Merged pull request #2 from jjatria/samesite, adding
        SameSite support to Cookie handling.

1.17  2018-10-02 MANWAR
      - Merged pull request #7 from asb-capfan/master, should fix
        CPAN Testers fail report on some windows box.