v0.5.3

Changelog

49d0d82 Upgrade Go packages
94cb877 Merge pull request #50 from chreble/master
e5e1782 Fix build
0ebb06d Merge pull request #45 from drivetopurchase/master
1176a44 Merge pull request #33 from Nessex/add-project-key-rate-limit
8aec020 Added rules support
a50c0a0 Remove hack for setting rate limit in create call
6ab5b1b Ensure rate limit actually gets set on key creation
14d4fff Add rate limit to create operation
f12e502 Add support for project key rate limits