Update request version (#209)

See https://nodesecurity.io/advisories/request_remote-memory-exposure

Author: aivus

package.json

@@ -41,7 +41,7 @@
     "he": "^1.1.0",
     "lodash": "^4.11.1",
     "normalize-url": "^1.5.3",
-    "request": "^2.42.0",
+    "request": "^2.81.0",
     "srcset": "^1.0.0"
   },
   "devDependencies": {