chore(deps): update devdependency standard-version to v9

Author: renovate[bot]

package.json

@@ -29,7 +29,7 @@
     "express": "^4.16.4",
     "jest": "^24.0.0",
     "memory-fs": "^0.4.1",
-    "standard-version": "^4.4.0"
+    "standard-version": "^9.5.0"
   },
   "dependencies": {
     "node-fetch": "^2.3.0"