Update package metadata (#10)

This change updates all of the package metadata.

- [x] Use the correct license identifier
- [x] Move all dev dependencies into `devDependencies`
- [x] Add a `publishConfig` and add a package scope (`@metamask`)
- [x] Add a explicit `files` list

package.json

@@ -1,26 +1,30 @@
 {
-  "name": "metamask-module-template",
+  "name": "@metamask/module-template",
   "version": "1.0.0",
   "description": "",
+  "publishConfig": {
+    "registry": "https://registry.npmjs.org/",
+    "access": "public"
+  },
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
   "types": "dist/index.d.ts",
+  "files": [
+    "dist/"
+  ],
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "prepublishOnly": "npm run build",
     "lint": "eslint --ext .ts,.js .",
     "build": "rollup --config"
   },
-  "author": "",
-  "license": "ISC",
-  "dependencies": {
-    "@rollup/plugin-commonjs": "^15.0.0",
-    "ts-node": "^9.0.0",
-    "typescript": "^4.0.2"
-  },
+  "license": "MIT",
   "devDependencies": {
+    "@rollup/plugin-commonjs": "^15.0.0",
     "@rollup/plugin-node-resolve": "^9.0.0",
     "rollup": "^2.26.9",
-    "rollup-plugin-typescript2": "^0.27.2"
+    "rollup-plugin-typescript2": "^0.27.2",
+    "ts-node": "^9.0.0",
+    "typescript": "^4.0.2"
   }
 }