chore(deps): update dependency standard-version to v8

Author: renovate-bot

package.json

@@ -46,7 +46,7 @@
     "nyc": "15.0.1",
     "sinon": "9.0.0",
     "standard": "12.0.1",
-    "standard-version": "7.1.0",
+    "standard-version": "8.0.0",
     "tap": "14.10.7",
     "weallbehave": "1.2.0",
     "weallcontribute": "1.0.9"