v1.9.0

Changelog

• 6b46eb4 A mutex in a test struct ...
• 020c058 Bump version
• f553cdb Continued e-mail support
• 3bc8ff0 Docs
• 8a625ef Docs, and fixing tests
• 7280ae1 Email rate limiting + tests
• 11b5ac4 Fully working email feature
• 873c57b Send emails