add playground

Author: johanrosenson

.gitignore

@@ -4,3 +4,4 @@
 /package
 tsconfig.tsbuildinfo
 package-lock.json
+playground-dist.js

lab.html

@@ -31,7 +31,8 @@
         "watch": "tsc --watch --preserveWatchOutput",
         "prepack": "npm run build",
         "prepublishOnly": "npm run build",
-        "test": "jest"
+        "test": "jest",
+        "playground": "webpack --config-name=playground --watch"
     },
     "dependencies": {},
     "devDependencies": {
@@ -40,6 +41,9 @@
         "@babel/preset-typescript": "^7.12.7",
         "@types/jest": "^26.0.20",
         "babel-jest": "^26.6.3",
-        "jest": "^26.6.3"
+        "jest": "^26.6.3",
+        "webpack": "^5.64.2",
+        "webpack-cli": "^4.9.1",
+        "webpack-notifier": "^1.14.1"
     }
 }