chore(package): update standard-version to version 8.0.0

Closes #1241

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
     "node-github-release": "^0.2.1",
     "react-test-renderer": "^16.6.3",
     "sinon": "^7.3.2",
-    "standard-version": "^4.4.0"
+    "standard-version": "^8.0.0"
   },
   "browserslist": [
     ">0.2%",