Fixing issue in dagrunner where tasks were never removed from running list

daggyd/libdaggyd/src/Server.cpp

@@ -587,8 +587,7 @@ namespace daggy::daggyd {
                   return a.startTime < b.startTime;
                 });
 
-      for (size_t i = 0; i < tr->attempts.size(); ++i) {
-        const auto &attempt = tr->attempts[i];
+      for (const auto &attempt : tr->attempts) {
         ss << "<tr><td valign=top>" << timePointToString(attempt.startTime)
            << "</td><td><pre>rc: " << attempt.rc
            << "\n\nstdout:\n--------------\n"