v2.2.1

Fixes

• Improve HTML escaping, by @phillipj.
• Fix inconsistency in defining global mustache object, by @simast.
• Fix switch-case indent error, by @norfish.
• Unpin chai and eslint versions, by @dasilvacontin.
• Update README.md with proper grammar, by @EvanLovely.
• Update mjackson username in README, by @mjackson.
• Remove syntax highlighting in README code sample, by @imagentleman.
• Fix typo in README, by @Xcrucifier.
• Fix link typo in README, by @keirog.