gi-notify-0.7.17: ChangeLog.md

### 0.7.17

+ Update to haskell-gi(-base) 0.22

### 0.7.16

+ Update stack version to 12.10

### 0.7.15

+ Remove enable-overloading flags, and use instead explicit CPP checks for 'haskell-gi-overloading-1.0', see [how to disable overloading](https://github.com/haskell-gi/haskell-gi/wiki/Overloading\#disabling-overloading).