Default disable/enable_if to a nat type instead of void, as many SFINAE expressions in funcions default to void *values that are valid parameters.

doc/move.qbk

@@ -802,6 +802,14 @@ Special thanks to:
 
 [section:release_notes Release Notes]
 
+[section:release_notes_boost_1_70 Boost 1.70 Release]
+
+*  Removed support for deprecated GCC compilers.
+*  Fixed bugs:
+   *  [@https://github.com/boostorg/move/pull/23 Git Pull #23: ['"Add minimal cmake file "]].
+
+[endsect]
+
 [section:release_notes_boost_1_69 Boost 1.69 Release]
 
 *  Deprecated GCC < 4.3 and MSVC < 9.0 (Visual 2008) compilers.