adding right scripts

.npmrc

@@ -0,0 +1,2 @@
+registry=https://registry.npmjs.org/
+package-lock=false

package.json

@@ -2,7 +2,7 @@
   "name": "site-inspector-demo",
   "version": "1.0.0",
   "scripts": {
-    "demo": "npm run all demo-install && demo-start",
+    "demo": "run-s demo-install demo-start",
     "demo-install": "npm --prefix ./src/Tabs/CaptureTab install ./src/Tabs/CaptureTab && npm --prefix ./src/Tabs/DynamicTabWithStore install ./src/Tabs/DynamicTabWithStore && npm --prefix ./src/SiteInspector install ./src/SiteInspector",
     "demo-start": "npm --prefix ./src/Tabs/CaptureTab run build && npm --prefix ./src/Tabs/DynamicTabWithStore run build && npm --prefix ./src/SiteInspector/ run start demo"
   },