Bump lodash from 4.17.23 to 4.18.1

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.23 to 4.18.1.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.23...4.18.1)

---
updated-dependencies:
- dependency-name: lodash
  dependency-version: 4.18.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -31,7 +31,7 @@
     "express-flash": "^0.0.2",
     "i18n": "^0.15.3",
     "json-as-xlsx": "^2.5.6",
-    "lodash": "^4.17.23",
+    "lodash": "^4.18.1",
     "nhsuk-prototype-rig": "^0.8.0",
     "response-time": "^2.3.4"
   },