Bump lodash from 3.10.1 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 3.10.1 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@3.10.1...4.17.21)

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

Author: dependabot[bot]

package-lock.json

@@ -17,7 +17,7 @@
   "license": "ISC",
   "dependencies": {
     "agentkeepalive": "^3.3.0",
-    "lodash": "^3.9.3",
+    "lodash": "^4.17.21",
     "nodeify": "^1.0.1",
     "request": "^2.73.0"
   },