* Update Boost version checking for VS2019 Preview 1
--HG--
branch : stable
// VS2017 Version 15.7.1 (cl compiler version 19.14.26428.1) updated _MSC_VER to 1914 - BillGord 20 May 2018\r
// VS2017 Version 15.8.0 (cl compiler version 19.15.26726) updated _MSC_VER to 1915 - BillGord 15 Aug 2018\r
// VS2017 Version 15.9.2 (cl compiler version 19.16.27024.1) updated _MSC_VER to 1916 - BillGord 09 Dec 2018\r
-#if (_MSC_VER > 1916) \r
+// VS2019 Version 16.0.0 (cl compiler version 19.20.27027.1) updated _MSC_VER to 1920 - BillGord 10 Dec 2018\r
+#if (_MSC_VER > 1920) \r
# if defined(BOOST_ASSERT_CONFIG)\r
# error "Unknown compiler version - please run the configure tests and report the results"\r
# else\r