Add support for Fourmolu 0.9 (#3331)

Co-authored-by: Michael Peyton Jones <[email protected]>

Author: brandonchinn178

plugins/hls-fourmolu-plugin/hls-fourmolu-plugin.cabal

@@ -35,7 +35,7 @@ library
   build-depends:
     , base            >=4.12 && <5
     , filepath
-    , fourmolu        ^>=0.3 || ^>=0.4 || ^>= 0.6 || ^>= 0.7 || ^>= 0.8
+    , fourmolu        ^>=0.3 || ^>=0.4 || ^>= 0.6 || ^>= 0.7 || ^>= 0.8 || ^>= 0.9
     , ghc
     , ghc-boot-th
     , ghcide          ^>=1.8