Add "unify", "reword" and "rephrase" (#13)

This adds the abovementioned verbs to the list of acceptable verbs in
imperative mood.

Author: mristin

Diff for: package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mristin/opinionated-commit-message",
-  "version": "1.0.2post1",
+  "version": "1.0.2post2",
   "description": "Github Action to check commit messages according to an opinionated style",
   "keywords": [
     "github",

Diff for: src/mostFrequentEnglishVerbs.ts

@@ -659,5 +659,8 @@ export const SET = new Set([
   'refactor',
   'reorganise',
   'reorganize',
-  'restructure'
+  'restructure',
+  'unify',
+  'reword',
+  'rephrase'
 ]);