Release v1.22.0

IMPROVEMENTS

• docs: rename 'payment code' to transaction code
• examples: add micro-entries / micro-deposits (#1103)
• feat: add ReadJSONFile and ReadJSONFileWith helpers
• feat: add Reversal() to files
• feat: add AllowInvalidCheckDigit validation option
• feat: add achcli IAT Support (#1100)
• feat: allow empty strings when allow missing file header opt is set

BUILD

• build(deps): bump nokogiri from 1.13.6 to 1.13.9 in /docs
• fix(deps): update module github.com/moov-io/base to v0.36.1
• fix(deps): update module github.com/stretchr/testify to v1.8.1
• fix(deps): update module golang.org/x/oauth2 to v0.1.0