gi-poppler-0.18.21: ChangeLog.md

### 0.18.21

+ Update for haskell-gi(-base)-0.23

### 0.18.20

+ Add support for inherited dependencies

### 0.18.19

+ Tighten bounds in haskell-gi(-base)

### 0.18.18

+ List autogenerated modules in .cabal file

### 0.18.17

+ Update to haskell-gi(-base) 0.22

### 0.18.16

+ Update stack version to 12.10

### 0.18.15

+ 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).