Implement fallback install and outputs (#2)

* Add better version support. Restructure code. Implement OS agnostic fallback

* Support latest for cabal and stack. Add enable-stack option.

* Add outputs

* Update documentation. Change default for GHC to latest.

tsconfig.json

@@ -8,12 +8,15 @@
       "es2020.symbol.wellknown"
     ],
     "module": "commonjs",
-    "outDir": "./lib",
+    "outDir": ".out",
+    "tsBuildInfoFile": ".out/tsbuildinfo",
+    "incremental": true,
     "rootDir": "./src",
     "strict": true,
     "noImplicitAny": true,
     "esModuleInterop": true,
-    "moduleResolution": "node"
+    "moduleResolution": "node",
+    "resolveJsonModule": true
   },
   "exclude": ["node_modules", "**/*.test.ts"]
 }