[Security] 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. **This update includes security fixes.**
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.21)

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

package.json

@@ -40,7 +40,7 @@
         "copyfiles": "^2.1.1",
         "ethereumjs-util": "^6.1.0",
         "express": "^4.17.1",
-        "lodash": "^4.17.15",
+        "lodash": "^4.17.21",
         "ora": "^3.4.0",
         "run-s": "^0.0.0",
         "websocket": "^1.0.29"

yarn.lock

@@ -4898,9 +4898,9 @@ lodash@4.17.14:
   version "4.17.14"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.14.tgz#9ce487ae66c96254fe20b599f21b6816028078ba"
 
-lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.4:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.21, lodash@^4.17.4:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 log-symbols@2.2.0, log-symbols@^2.2.0:
   version "2.2.0"