Add support for aeson >= 2.0 #387
Description
- As it is needed for build the package alongside other packages using that version of aeson (like haskell-language-server, see Build with aeson >= 2.0 haskell-language-server#2477)
- And include the security fix of course
- See Migration guide 1.5 -> 2.0 aeson#881
- If possible it would be great to support also aeson < 2.0