Release v0.3.21

Changelog

• 0fe03b9 Bump actions/setup-go from 2.1.5 to 2.2.0
• 8b87f20 Bump github.com/tonicpow/go-paymail from 0.7.0 to 0.7.1
• 98b6191 Bumped version
• 7f30ea8 Merge pull request #47 from mrz1836/dependabot/go_modules/master/github.com/tonicpow/go-paymail-0.7.1
• ceb1ad3 Merge pull request #49 from mrz1836/dependabot/github_actions/master/actions/setup-go-2.2.0
• 5f4e264 Replaced chalker with color pkg
• 8d4986f Upgraded and changed deps
• b8d678c Upgraded badger to v3