chore(package): update standard-version to version 7.0.0 (#532)

Author: greenkeeper[bot]

package.json

@@ -163,7 +163,7 @@
     "react-test-renderer": "16.8.1",
     "regenerator-runtime": "^0.13.1",
     "shelljs": "0.8.2",
-    "standard-version": "^4.4.0",
+    "standard-version": "^7.0.0",
     "start-server-and-test": "^1.7.13"
   }
 }