chore(deps): bump lodash from 4.17.14 to 4.17.19 in /functions

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.14 to 4.17.19.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.14...4.17.19)

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

functions/package-lock.json

@@ -2404,9 +2404,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.14",
+      "version": "4.17.19",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.14.tgz",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-      "integrity": "sha512-mmKYbW3GLuJeX+iGP+Y7Gp1AiGHGbXHCOh/jZmrawMmsE7MS4znI3RL2FsjbqOyMayHInjOeykW7PEajUk1/xw=="
+      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ=="
     },
     "lodash.at": {
       "version": "4.6.0",