Log Message:
Update to 0.51

Upstream changes:
0.51     2022-08-15
        - Bump min perl version to 5.16 (as per core Mojolicious)

0.50     2022-08-08
        - Allow client_id / client_secret in body params (GH #28)

0.49     2022-06-02
        - Fix tests broken by Mojolicious multiple render fixes (GH #27)

0.48     2021-06-15
        - Accept error_description from auth methods (GH #26)