add express

package.json

@@ -29,6 +29,7 @@
     "babel-jest": "^23.6.0",
     "eslint": "^5.8.0",
     "eslint-plugin-vue": "^5.0.0-0",
+    "express": "^4.16.4",
     "lint-staged": "^7.2.2",
     "node-sass": "^4.9.0",
     "sass-loader": "^7.0.1",

yarn.lock

@@ -3818,7 +3818,7 @@ expect@^23.6.0:
     jest-message-util "^23.4.0"
     jest-regex-util "^23.3.0"
 
-express@^4.16.2, express@^4.16.3:
+express@^4.16.2, express@^4.16.3, express@^4.16.4:
   version "4.16.4"
   resolved "https://registry.npmjs.org/express/-/express-4.16.4.tgz#fddef61926109e24c515ea97fd2f1bdbf62df12e"
   integrity sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==