fix(package): update firefox-profile to version 1.2.0 (#1359)

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "es6-error": "4.1.1",
     "es6-promisify": "5.0.0",
     "event-to-promise": "0.8.0",
-    "firefox-profile": "1.1.0",
+    "firefox-profile": "1.2.0",
     "fx-runner": "1.0.9",
     "git-rev-sync": "1.9.1",
     "mkdirp": "0.5.1",