chore: require semantic-release >=20.1.0

BREAKING CHANGE: The plugin is not compatible with semantic-release < 20.1.0

Author: fgreinacher

package.json

@@ -76,7 +76,7 @@
     "trailingComma": "es5"
   },
   "peerDependencies": {
-    "semantic-release": ">=18.0.0"
+    "semantic-release": ">=20.1.0"
   },
   "publishConfig": {
     "access": "public"