Bump lodash from 4.17.11 to 4.17.21 (#264)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.11...4.17.21)

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

package.json

@@ -17,7 +17,7 @@
     "bluebird": "^3.3.3",
     "buffer-crc32": "^0.2.5",
     "hashring": "^3.2.0",
-    "lodash": "=4.17.11",
+    "lodash": "=4.17.21",
     "murmur-hash-js": "^1.0.0",
     "nice-simple-logger": "^1.0.1",
     "wrr-pool": "^1.0.3",