v0.2.2

Changelog

• f6f9aab Add: ensure --coin-flip-percent is reasonable enough to satisfy half the --bulk-size with current --rows
• a4a3ecf Add: helper message for mysql foreign_key_checks
• 4465fa0 Add: ignoring missing FK for mysql
• bccde22 Fix: enum missing appropriate quote
• 15d11b1 Update README.md