Bump run-sequence from 1.2.2 to 2.2.1 (#128)

Bumps [run-sequence](https://github.com/OverZealous/run-sequence) from 1.2.2 to 2.2.1.
- [Release notes](https://github.com/OverZealous/run-sequence/releases)
- [Changelog](https://github.com/OverZealous/run-sequence/blob/master/CHANGELOG.md)
- [Commits](OverZealous/run-sequence@v1.2.2...v2.2.1)

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

package.json

@@ -9,7 +9,7 @@
     "gulp-concat": "^2.5.2",
     "gulp-sourcemaps": "^2.6.5",
     "gulp-uglify": "^3.0.2",
-    "run-sequence": "^1.1.0",
+    "run-sequence": "^2.2.1",
     "merge-stream": "^2.0.0"
   },
   "author": "",