add dev:esm script

package.json

@@ -14,6 +14,7 @@
   "scripts": {
     "dev": "rollup -w -c build/config.js --environment TARGET:web-full-dev",
     "dev:cjs": "rollup -w -c build/config.js --environment TARGET:web-runtime-cjs",
+    "dev:esm": "rollup -w -c build/config.js --environment TARGET:web-runtime-esm",
     "dev:test": "karma start build/karma.dev.config.js",
     "dev:ssr": "rollup -w -c build/config.js --environment TARGET:web-server-renderer",
     "dev:compiler": "rollup -w -c build/config.js --environment TARGET:web-compiler ",