Bump serve-handler from 6.1.3 to 6.1.5 (#738)

* Bump `serve-handler` from `6.1.3` to `6.1.4`

* Bump to 6.1.5

* Fix lockfile

Author: AndyBitz

package.json

@@ -45,7 +45,7 @@
     "clipboardy": "3.0.0",
     "compression": "1.7.4",
     "is-port-reachable": "4.0.0",
-    "serve-handler": "6.1.3",
+    "serve-handler": "6.1.5",
     "update-check": "1.5.4"
   },
   "devDependencies": {