Update dependency lodash to v4.17.21

package.json

@@ -90,7 +90,7 @@
     "karma-sourcemap-loader": "0.3.8",
     "karma-spec-reporter": "0.0.26",
     "karma-webpack": "4.0.2",
-    "lodash": "4.17.11",
+    "lodash": "4.17.21",
     "lolex": "1.6.0",
     "mini-css-extract-plugin": "0.5.0",
     "mocha": "3.5.3",

yarn.lock

@@ -5726,7 +5726,12 @@ lodash.uniq@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
 
-lodash@4.17.11, lodash@^4.17.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.5.0:
+lodash@4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
+lodash@^4.17.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.5.0:
   version "4.17.11"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"