Bump lodash from 4.17.11 to 4.17.13 in /app

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

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

app/package.json

@@ -41,7 +41,7 @@
     "font-awesome": "^4.7.0",
     "immutable": "^3.8.1",
     "jquery": "^3.2.1",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.13",
     "lodash-es": "^4.17.4",
     "moment": "^2.18.1",
     "querystring": "^0.2.0",

app/yarn.lock

@@ -1062,9 +1062,9 @@ lodash-es@^4.17.4:
   version "4.17.10"
   resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.10.tgz#62cd7104cdf5dd87f235a837f0ede0e8e5117e05"
 
-lodash@^4.13.1, lodash@^4.17.4:
-  version "4.17.10"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
+lodash@^4.13.1, lodash@^4.17.13, lodash@^4.17.4:
+  version "4.17.13"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.13.tgz#0bdc3a6adc873d2f4e0c4bac285df91b64fc7b93"
 
 loose-envify@^1.0.0:
   version "1.3.1"