Merge pull request #8 from midwayjs/fix/update_midway_mirror

fix: update midway-mirror to 0.6.0

Author: guangwong

packages/sandbox-core/package.json

@@ -8,7 +8,7 @@
     "glob": "^7.1.2",
     "lodash": "^4.17.10",
     "md5": "^2.2.1",
-    "midway-mirror": "^0.4.0",
+    "midway-mirror": "^0.6.0",
     "moment": "^2.22.2",
     "mysql2": "^1.5.3",
     "sequelize": "^4.39.0",