Bump lodash from 4.17.11 to 4.17.19 (#254)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.11...4.17.19)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -36,7 +36,7 @@
     "enumify": "^1.0.4",
     "jquery": "^3.1.0",
     "load-awesome": "^1.1.0",
-    "lodash": "4.17.11",
+    "lodash": "4.17.19",
     "reveal.js": "^3.3.0",
     "selectize": "^0.12.2",
     "selectize-scss": "^0.9.1",