fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-6032459

package.json

@@ -19,7 +19,7 @@
  },
  "homepage": "https://github.com/AlgoSolver/server#readme",
  "dependencies": {
- "axios": "^0.21.3",
+ "axios": "^1.6.0",
  "bcryptjs": "^2.4.3",
  "cookie-parser": "^1.4.5",
  "cors": "^2.8.5",
@@ -33,7 +33,7 @@
  "joi-objectid": "^3.0.1",
  "jsonwebtoken": "^8.5.1",
  "mailgun-js": "^0.22.0",
- "mailgun.js": "^7.0.0",
+ "mailgun.js": "^8.1.0",
  "mongoose": "^6.4.6",
  "mongoose-paginate-v2": "^1.3.17",
  "morgan": "^1.10.0",