fix[Mock]: add error handling

mock/mock-server.js

@@ -48,6 +48,7 @@ module.exports = app => {
     ignoreInitial: true
   }).on('all', (event, path) => {
     if (event === 'change' || event === 'add') {
+      try {
         // remove mock routes stack
         app._router.stack.splice(mockStartIndex, mockRoutesLength)
 
@@ -59,6 +60,9 @@ module.exports = app => {
         mockStartIndex = mockRoutes.mockStartIndex
 
         console.log(chalk.magentaBright(`\n > Mock Server hot reload success! changed  ${path}`))
+      } catch (error) {
+        console.log(chalk.redBright(error))
+      }
     }
   })
 }