Reverted ANSI colour change (it was failing for Windows)

Produced build 20

include/internal/catch_console_colour_impl.hpp

@@ -10,7 +10,7 @@
 
 #include "catch_console_colour.hpp"
 
-#if !defined( CATCH_CONFIG_NO_COLOUR )
+#if defined( CATCH_CONFIG_USE_ANSI_COLOUR_CODES )
 
 #include <unistd.h>
 

include/internal/catch_version.hpp

@@ -13,7 +13,7 @@
 namespace Catch {
 
     // These numbers are maintained by a script
-    Version libraryVersion( 0, 9, 19, "integration" );
+    Version libraryVersion( 0, 9, 20, "integration" );
 }
 
 #endif // TWOBLUECUBES_CATCH_VERSION_HPP_INCLUDED