Chore: upgrade NPM security vulnerabilities (#30397)

* chore: bump serialize-javascript dependents to use 3.1.0+

* chore: manually bump is-my-json-valid to 2.20.5

* chore: resolve kind-of@6 to 6.0.3

* chore: bump webpack-dev-server to solve faye-websocket vulnerability

packages/grafana-toolkit/package.json

@@ -56,7 +56,7 @@
     "command-exists": "^1.2.8",
     "commander": "^5.0.0",
     "concurrently": "4.1.0",
-    "copy-webpack-plugin": "5.1.1",
+    "copy-webpack-plugin": "5.1.2",
     "css-loader": "3.4.2",
     "eslint": "7.4.0",
     "eslint-config-prettier": "7.2.0",
@@ -100,7 +100,7 @@
     "semver": "^7.1.3",
     "simple-git": "^1.132.0",
     "style-loader": "1.1.3",
-    "terser-webpack-plugin": "2.3.5",
+    "terser-webpack-plugin": "2.3.7",
     "ts-jest": "26.4.4",
     "ts-loader": "6.2.1",
     "ts-node": "9.0.0",