Bump lodash from 4.17.11 to 4.17.13 (#393)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.13.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.11...4.17.13)

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

Author: dependabot[bot]

package-lock.json

@@ -58,7 +58,7 @@
     "gulp-sass": "^3.1.0",
     "gulp-uglify": "^3.0.0",
     "js-yaml": "^3.13.1",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.13",
     "run-sequence": "^2.2.0"
   },
   "dependencies": {