Bump lodash from 4.17.13 to 4.17.15 in /apps/block_scout_web/assets

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.13 to 4.17.15.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.13...4.17.15)

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

apps/block_scout_web/assets/package-lock.json

@@ -6961,9 +6961,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.13",
+      "version": "4.17.15",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.13.tgz",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-      "integrity": "sha512-vm3/XWXfWtRua0FkUyEHBZy8kCPjErNBT9fJx8Zvs+U6zjqPbTUOpkaoum3O5uiA8sm+yNMHXfYkTUHFoMxFNA=="
+      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
     },
     "lodash.assign": {
       "version": "4.2.0",

apps/block_scout_web/assets/package.json

@@ -30,7 +30,7 @@
     "highlightjs-solidity": "^1.0.6",
     "humps": "^2.0.1",
     "jquery": "^3.3.1",
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.15",
     "moment": "^2.22.1",
     "nanomorph": "^5.1.3",
     "numeral": "^2.0.6",