Update flawed install script (#31)

* Update flawed install script.

* Move typescript and node types to dev dependencies.

package.json

@@ -8,17 +8,16 @@
   "license": "LGPL-2.1",
   "gypfile": true,
   "dependencies": {
-    "@types/node": "^14.14.7",
     "node-addon-api": "^3.0.0",
     "node-pre-gyp": "^0.16.0",
-    "node-pre-gyp-github": "^1.4.3",
-    "typescript": "^4.1.2"
+    "node-pre-gyp-github": "^1.4.3"
   },
   "devDependencies": {
     "@babel/core": "^7.12.9",
     "@babel/preset-env": "^7.12.7",
     "@babel/preset-typescript": "^7.12.7",
     "@types/jest": "^26.0.15",
+    "@types/node": "^14.14.41",
     "@typescript-eslint/eslint-plugin": "^4.8.2",
     "@typescript-eslint/parser": "^4.8.2",
     "babel-jest": "^26.6.3",
@@ -27,7 +26,8 @@
     "jest": "^26.6.3",
     "prettier": "^2.2.0",
     "typedoc": "^0.20.25",
-    "typedoc-plugin-markdown": "^3.5.0"
+    "typedoc-plugin-markdown": "^3.5.0",
+    "typescript": "^4.2.4"
   },
   "engines": {
     "node": ">=10.24.0 <=15.11.0"
@@ -38,7 +38,7 @@
     "format-check": "prettier --check .",
     "generate-docs": "typedoc --plugin typedoc-plugin-markdown --hideBreadcrumbs true --tsconfig ./tsconfig.json ./src/libraw.ts && rm ./docs/README.md",
     "lint": "eslint . --ext .ts",
-    "install": "node-pre-gyp install --fallback-to-build && tsc",
+    "install": "node-pre-gyp install --fallback-to-build",
     "test": "jest",
     "test-watch": "jest --watch"
   },