Update version to v0.5.6

Specify files to publish

Merge pull request #87 from ryanblock/master

Excludes `coverage/` in .npmignore

bump version to v0.5.3

Merge pull request #53 from alexjab/master

Move nbf and exp verifications after signature verification.

Release v0.5.0

Release v0.4.1

Release v0.4.0

Release v0.3.1

Release 0.3.0