fix(deps): bump random-http-useragent from 1.1.19 to 1.1.20

Bumps [random-http-useragent](https://github.com/hfreire/random-http-useragent) from 1.1.19 to 1.1.20.
- [Release notes](https://github.com/hfreire/random-http-useragent/releases)
- [Commits](hfreire/random-http-useragent@v1.1.19...v1.1.20)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -24,7 +24,7 @@
     "commander": "3.0.2",
     "lodash": "4.17.15",
     "nightmare": "3.0.2",
-    "random-http-useragent": "1.1.19"
+    "random-http-useragent": "1.1.20"
   },
   "devDependencies": {
     "babel-cli": "6.26.0",