Bump nodemon from 1.18.7 to 1.18.8

Bumps [nodemon](https://github.com/remy/nodemon) from 1.18.7 to 1.18.8.
- [Release notes](https://github.com/remy/nodemon/releases)
- [Commits](remy/nodemon@v1.18.7...v1.18.8)

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

package.json

@@ -42,7 +42,7 @@
     "@types/supertest": "2.0.7",
     "ava": "0.25.0",
     "coveralls": "^3.0.2",
-    "nodemon": "1.18.7",
+    "nodemon": "1.18.8",
     "nyc": "^13.0.1",
     "sinon": "7.1.1",
     "supertest": "3.3.0",