feat: add test script

Author: VincentHardouin

Diff for: package.json

@@ -18,7 +18,7 @@
     "db:seed": "knex --knexfile ./db/knexfile.js seed:run",
     "db:reset": "npm run db:prepare && npm run db:seed",
     "lint": "eslint .",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "mocha --exit --recursive --reporter=${MOCHA_REPORTER:-dot} tests"
   },
   "dependencies": {
     "cron": "^3.1.7",