Require ghc-mod >= 2.1.2

Author: eagletmt

README.md

@@ -27,7 +27,7 @@ See `:help :filetype-overview` for more details.
 ### vimproc
 https://github.com/Shougo/vimproc
 
-### ghc-mod
+### ghc-mod >= 2.1.2
 ```sh
 cabal install ghc-mod
 ```

after/ftplugin/haskell/ghcmod.vim

@@ -11,7 +11,7 @@ if !exists('s:has_ghc_mod')
     finish
   endif
 
-  let s:required_version = [1, 10, 11]
+  let s:required_version = [2, 1, 2]
   if !ghcmod#util#check_version(s:required_version)
     call ghcmod#util#print_error(printf('ghcmod: requires ghc-mod %s or higher', join(s:required_version, '.')))
     finish