fix typescript compile error
@ -21,7 +21,7 @@
"license": "ISC",
"dependencies": {
"@types/kcors": "^2.2.2",
"@types/koa": "^2.0.43",
"@types/koa": "2.0.43",
"@types/koa-router": "^7.0.27",
"@types/mocha": "^2.2.46",
"chalk": "^2.4.1",