chore(package): update @types/webpack-stream to version 3.2.8

package.json

@@ -62,7 +62,7 @@
     "@types/serve-favicon": "2.2.28",
     "@types/uuid": "3.4.2",
     "@types/webpack": "3.0.13",
-    "@types/webpack-stream": "3.2.7",
+    "@types/webpack-stream": "3.2.8",
     "@types/websocket": "0.0.34",
     "awesome-typescript-loader": "3.2.3",
     "chai": "4.1.2",