change(renovate): ignore semver

will revise when resolved: rhysd/go-github-selfupdate#31

Author: l3uddz

Diff for: renovate.json

@@ -7,5 +7,8 @@
   ],
   "postUpdateOptions": [
     "gomodTidy"
+  ],
+  "ignoreDeps": [
+    "semver"
   ]
 }