Headers include fix (#426)

* Header Fixes

* Format fix

tests/lib/transpose/transpose.cpp

@@ -30,6 +30,7 @@
 #include <mutex>
 #include <random>
 #include <stdexcept>
+#include <thread>
 
 #if defined(USE_MPI)
 #    include <mpi.h>

tests/lib/vector-operations/vector-ops.cpp

@@ -28,6 +28,7 @@
 #include <algorithm>
 #include <iostream>
 #include <mutex>
+#include <thread>
 #include <vector>
 
 #include "common/defines.hpp"