fix header

Author: albestro

tests/buffer.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 
 #ifdef ZMQ_CPP17

tests/codec_multipart.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq_addon.hpp>
 
 #ifdef ZMQ_CPP11

tests/context.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 
 #if (__cplusplus >= 201703L)

tests/message.cpp

@@ -1,5 +1,5 @@
 #define CATCH_CONFIG_MAIN
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 
 #if defined(ZMQ_CPP11)

tests/multipart.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq_addon.hpp>
 
 #ifdef ZMQ_HAS_RVALUE_REFS

tests/recv_multipart.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq_addon.hpp>
 #ifdef ZMQ_CPP11
 

tests/send_multipart.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq_addon.hpp>
 #ifdef ZMQ_CPP11
 

tests/socket.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 #ifdef ZMQ_CPP11
 #include <future>

tests/socket_ref.cpp

@@ -1,4 +1,4 @@
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 #ifdef ZMQ_CPP11
 

tests/testutil.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <catch.hpp>
+#include <catch2/catch.hpp>
 #include <zmq.hpp>
 
 #if defined(ZMQ_CPP11)