patch 8.1.0870: Vim doesn't use the new ConPTY support in Windows 10

Problem:    Vim doesn't use the new ConPTY support in Windows 10.
Solution:   Use ConPTY support, if available. (Nobuhiro Takasaki, closes #3794)
diff --git a/src/testdir/test_mksession.vim b/src/testdir/test_mksession.vim
index 3038422..456cd1e 100644
--- a/src/testdir/test_mksession.vim
+++ b/src/testdir/test_mksession.vim
@@ -295,7 +295,7 @@
       call assert_report('unexpected shell line: ' . line)
     endif
   endfor
-  call assert_match('terminal ++curwin ++cols=\d\+ ++rows=\d\+\s*$', term_cmd)
+  call assert_match('terminal ++curwin ++cols=\d\+ ++rows=\d\+\s*.*$', term_cmd)
 
   call Stop_shell_in_terminal(bufnr('%'))
   call delete('Xtest_mks.out')
@@ -375,7 +375,7 @@
       let term_cmd = line
     endif
   endfor
-  call assert_match('terminal ++curwin ++cols=\d\+ ++rows=\d\+ other', term_cmd)
+  call assert_match('terminal ++curwin ++cols=\d\+ ++rows=\d\+.*other', term_cmd)
 
   call Stop_shell_in_terminal(bufnr('%'))
   call delete('Xtest_mks.out')