patch 8.1.2299: ConPTY in MS-Windows 1909 is still wrong

Problem:    ConPTY in MS-Windows 1909 is still wrong.
Solution:   Use same solution as for 1903. (Nobuhiro Takasaki, closes #5217)
diff --git a/src/version.c b/src/version.c
index d763e4c..2221d64 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2299,
+/**/
     2298,
 /**/
     2297,