fix: added check comments lib

Author: newnewb

lib/comments.js

@@ -0,0 +1,18 @@
+/**
+ * Checks for a previous bot comment, if found returns the commen
+ */
+async function checkComments(issues,pull){
+    const comments = await issues.getComments(pull)
+    let result 
+//iterates over all the comments
+  for (comment of comments['data']){
+    if(comment.user.login=='testing-bot[bot]'&&comment.user.type=='Bot'){ //looks for the first comment made by the bot
+    result = comment
+    break
+    }
+  }
+
+  return result
+}
+
+module.exports = checkComments