Bump lodash from 4.17.13 to 4.17.19 in /webext (#333)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.13 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.13...4.17.19)

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

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

webext/package-lock.json

@@ -6845,9 +6845,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.13",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.13.tgz",
-      "integrity": "sha512-vm3/XWXfWtRua0FkUyEHBZy8kCPjErNBT9fJx8Zvs+U6zjqPbTUOpkaoum3O5uiA8sm+yNMHXfYkTUHFoMxFNA=="
+      "version": "4.17.19",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
+      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ=="
     },
     "lodash.assign": {
       "version": "4.2.0",

webext/package.json

@@ -26,7 +26,7 @@
     "webpack-cli": "^3.3.4"
   },
   "dependencies": {
-    "lodash": "^4.17.13",
+    "lodash": "^4.17.19",
     "string-width": "^2.1.1"
   }
 }