Bump lodash from 4.17.15 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.21)

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

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "ethereumjs-util": "5.2.0",
     "ethers": "4.0.44",
     "hdkey": "1.1.1",
-    "lodash": "4.17.15",
+    "lodash": "4.17.21",
     "synthetix": "2.67.0-alpha",
     "trezor-connect": "8.1.8",
     "walletlink": "2.0.2"