fix(ncu-ci): fetch commits instead of PR metadata (#915)

Author: aduh95

Diff for: lib/ci/run_ci.js

@@ -26,7 +26,7 @@ export class RunPRJob {
     this.prData = new PRData({ prid, owner, repo }, cli, request);
     this.certifySafe =
       certifySafe ||
-      Promise.all([this.prData.getReviews(), this.prData.getPR()]).then(() =>
+      Promise.all([this.prData.getReviews(), this.prData.getCommits()]).then(() =>
         (this.certifySafe = new PRChecker(cli, this.prData, request, {}).getApprovedTipOfHead())
       );
   }

Diff for: lib/pr_checker.js

@@ -531,7 +531,7 @@ export default class PRChecker {
     const { maxCommits } = argv;
 
     if (commits.length === 0) {
-      cli.warn('No commits found');
+      cli.warn('No commits detected');
       return false;
     }