1.3.0

• fix: also remove dot-stuffing from leftovers #9
  • thanks to report at haraka/haraka-plugin-dkim#17
• test: add tests for removing dot-stuffing
• fix: replace polynomial regex with trimEnd()
• change: rename dot_stuffing -> dot_stuffed, consistent with Haraka
  • improves readability, fixes a case of the not nots
• change: switch test runner from mocha to node --test
• doc(README): add ref to Haraka Transaction docs showing usage
• deps(test-fixtures): bump to latest