bump: update @vue/cli-plugin-eslint version

package.json

@@ -29,7 +29,7 @@
     "@babel/core": "7.0.0",
     "@babel/register": "7.0.0",
     "@vue/cli-plugin-babel": "3.6.0",
-    "@vue/cli-plugin-eslint": "3.6.0",
+    "@vue/cli-plugin-eslint": "^3.9.1",
     "@vue/cli-plugin-unit-jest": "3.6.3",
     "@vue/cli-service": "3.6.0",
     "@vue/test-utils": "1.0.0-beta.29",