chore: remove period from package description

Author: jdbruijn

package.json

@@ -1,10 +1,11 @@
 {
   "name": "commitlint-plugin-function-rules",
   "version": "3.0.0",
-  "description": "commitlint plugin to define rules as functions.",
+  "description": "commitlint plugin to use functions as rule value",
   "keywords": [
     "commitlint",
     "commitlintplugin",
+    "function",
     "plugin",
     "rules"
   ],