basic parsing stub using optparse-applicative

wasm.cabal

@@ -33,6 +33,7 @@ library
     , vector >= 0.12
     , ieee754 >= 0.8
     , deepseq >= 1.4
+    , optparse-applicative >= 0.14
   build-tools:
       alex >=3.1.3
     , happy >=1.9.4
@@ -58,6 +59,9 @@ executable wasm
     , wasm ==0.1.0
     , optparse-applicative >= 0.13
     , bytestring >=0.10 && <0.11
+  other-modules:
+    Wasm.WasmParser
+
 
 test-suite test
   type: exitcode-stdio-1.0