Bump lodash from 4.17.19 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.19 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.19...4.17.21)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -12,7 +12,7 @@
     "eslint": "^5.0.1",
     "espower-loader": "^1.2.2",
     "intelli-espower-loader": "^1.0.1",
-    "lodash": ">=4.17.19",
+    "lodash": ">=4.17.21",
     "mocha": "^5.2.0",
     "power-assert": "^1.6.0"
   },