Changelog mailpool

Release 2.2.3 2020.12.03

• No I need to fix haskell net

Release 2.2.2 2020.12.03

• Maybe it works if we put the same base constraint on this package as haskell net?

Release 2.2.1 2020.12.03

• Try making hackage build by upgrading haskell net

Release 2.2.0 2020.12.02

• Add changelog
• Add fromJSON instance to smtp cred so this easily works with yesod.
• Improve docs.