patch 8.2.2847: Perl not tested sufficiently

Problem:    Perl not tested sufficiently.
Solution:   Add test.  Also test W17. (Dominique Pellé, closes #8193)
diff --git a/src/version.c b/src/version.c
index 4843be1..f1f2a1c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2847,
+/**/
     2846,
 /**/
     2845,