patch 8.2.1273: MS-Windows: terminal test may leave file behind

Problem:    MS-Windows: terminal test may leave file behind.
Solution:   Wait a moment for process to end before deleting the file.
            (Taro Muraoka, closes #6513)
diff --git a/src/version.c b/src/version.c
index 36951df..ed8f6c4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1273,
+/**/
     1272,
 /**/
     1271,