Vim 8.1 release

Update version number and information.  Fix a couple of tests.
diff --git a/nsis/gvim_version.nsh b/nsis/gvim_version.nsh
index 4481f32..f34feab 100644
--- a/nsis/gvim_version.nsh
+++ b/nsis/gvim_version.nsh
@@ -2,5 +2,5 @@
 !ifndef __GVIM_VER__NSH__
 !define __GVIM_VER__NSH__
 !define VER_MAJOR 8
-!define VER_MINOR 0
+!define VER_MINOR 1
 !endif