Update unexpected-stream to ^5.0.0

Author: papandreou

package.json

@@ -57,7 +57,7 @@
     "unexpected": "^12.0.0",
     "unexpected-documentation-site-generator": "^6.0.0",
     "unexpected-markdown": "^5.0.0",
-    "unexpected-stream": "^4.0.0"
+    "unexpected-stream": "^5.0.0"
   },
   "dependencies": {
     "bufferedstream": "^3.1.1",