Improve structure using Polysemy

package.yaml

@@ -1,21 +1,32 @@
 name: minesweeper
 version: 0.1.0.0
 
-ghc-options: -Wall
+ghc-options: -Wall -O2 -flate-specialise -fspecialise-aggressively -fplugin=Polysemy.Plugin
+
+default-extensions:
+  - DataKinds
+  - FlexibleContexts
+  - GADTs
+  - LambdaCase
+  - PolyKinds
+  - RankNTypes
+  - ScopedTypeVariables
+  - TypeApplications
+  - TypeOperators
+  - TypeFamilies
 
 dependencies:
-  base
+  - base
+  - polysemy-plugin
+  - polysemy
+  - random
+  - containers
+  - array
+  - split
+  - mtl
 
 library:
   source-dirs: src/
-  exposed-modules:
-    Lib
-  dependencies:
-    - containers
-    - array
-    - split
-    - mtl
-    - random
 
 executables:
   minesweeper:
@@ -23,7 +34,6 @@ executables:
     main: Main.hs
     dependencies:
       - minesweeper
-      - random
       - optparse-generic
 
 tests: