imeplemented array concatenation method

src/runner.ts

@@ -113,17 +113,12 @@ export class ActionRunner {
     this.logger.debug(JSON.stringify(rule));
 
     // This is a list of all the users that need to approve a PR
-    const requiredUsers: string[] = [];
+    let requiredUsers: string[] = [];
     // If team is set, we fetch the members of such team
     if (rule.teams) {
       for (const team of rule.teams) {
         const members = await this.teamApi.getTeamMembers(team);
-        for (const member of members) {
-          // simple check to stop us from having duplicates
-          if (requiredUsers.indexOf(member) < 0) {
-            requiredUsers.push(member);
-          }
-        }
+        requiredUsers = concatArraysUniquely(requiredUsers, members);
       }
       // If, instead, users are set, we simply push them to the array as we don't need to scan a team
     } else if (rule.users) {