Update dependency mocha to v10

package.json

@@ -14,7 +14,7 @@
  "devDependencies": {
  "chai": "4.2.0",
  "koa": "2.5.3",
- "mocha": "2.5.3",
+ "mocha": "10.7.3",
  "supertest": "3.2.0"
  }
 }