fix(core): update

package.json

@@ -9,7 +9,7 @@
   "license": "MIT",
   "scripts": {
     "test": "(tstest test/ --web)",
-    "build": "(tsbuild --web)"
+    "build": "(tsbuild --web && tsbundle npm)"
   },
   "devDependencies": {
     "@gitzone/tsbuild": "^2.1.27",
@@ -23,7 +23,7 @@
   "dependencies": {
     "@apiglobal/typedrequest": "^1.0.58",
     "@apiglobal/typedrequest-interfaces": "^1.0.15",
-    "broadcast-channel": "^4.2.0"
+    "broadcast-channel": "^3.7.0"
   },
   "files": [
     "ts/**/*",