Update include paths in tests

test/test_cat.cc

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 namespace sp = subprocess;
 

test/test_double_quotes.cc

@@ -1,4 +1,4 @@
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 #include <cassert>
 #include <string>

test/test_env.cc

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 using namespace subprocess;
 

test/test_err_redirection.cc

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 using namespace subprocess;
 

test/test_exception.cc

@@ -1,6 +1,6 @@
 #include <cassert>
 #include <cstring>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 namespace sp = subprocess;
 

test/test_redirection.cc.in

@@ -1,4 +1,4 @@
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 #include <cstdlib>
 #include <string>

test/test_ret_code.cc

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 namespace sp = subprocess;
 

test/test_subprocess.cc

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <subprocess.hpp>
+#include <cpp-subprocess/subprocess.hpp>
 
 using namespace subprocess;