add web-test-runner config

Author: keithamus

web-test-runner.config.js

@@ -0,0 +1,12 @@
+import {esbuildPlugin} from '@web/dev-server-esbuild'
+export default {
+  files: ['test/*'],
+  nodeResolve: true,
+  plugins: [esbuildPlugin({ts: true, target: 'es2020'})],
+  testFramework: {
+    config: {
+      ui: 'tdd',
+      timeout: 500
+    }
+  }
+}