Update package.json

package.json

@@ -87,7 +87,7 @@
     "lint-staged": "^8.1.1",
     "merge-umi-mock-data": "^1.0.4",
     "mockjs": "^1.0.1-beta3",
-    "prettier": "1.16.4",
+    "prettier": "^1.16.4",
     "slash2": "^2.0.0",
     "stylelint": "^9.10.1",
     "stylelint-config-css-modules": "^1.3.0",