update master to V7

web-dev-server.config.mjs

@@ -0,0 +1,12 @@
+import {fromRollup} from '@web/dev-server-rollup';
+import rollupCommonjs from '@rollup/plugin-commonjs';
+
+const commonjs = fromRollup(rollupCommonjs);
+
+export default {
+  plugins: [
+    commonjs({
+      exclude: ['src', 'dist', 'instrumented']
+    })
+  ]
+};