Completed

package.json

@@ -1,13 +1,17 @@
 {
   "name": "babel-decorators",
-  "version": "1.0.0",
+  "version": "0.1.0",
   "main": "index.js",
   "license": "MIT",
   "scripts": {
-    "test": "mocha test/**/*.ts"
+    "test": "mocha test/**/*.ts",
+    "postinstall": "mkdir -p lib; cd test/snapshots && ls | sed \"s/.*/'&'/\" | paste -sd '|' | sed -e \"s/^/export type Snapshot = /\" - > ../snapshots.d.ts"
   },
   "devDependencies": {
     "@babel/core": "^7.14.8",
+    "@babel/plugin-transform-modules-commonjs": "^7.14.5",
+    "@babel/preset-typescript": "^7.14.5",
+    "@babel/register": "^7.14.5",
     "@babel/types": "^7.14.8",
     "@types/babel__core": "^7.1.15",
     "@types/chai": "^4.2.21",
@@ -20,5 +24,13 @@
     "prettier": "^2.3.2",
     "ts-node": "^10.1.0",
     "typescript": "^4.3.5"
+  },
+  "prettier": {
+    "arrowParens": "avoid",
+    "tabWidth": 2,
+    "printWidth": 90,
+    "semi": false,
+    "singleQuote": false,
+    "trailingComma": "es5"
   }
 }