patch 8.1.1187: cannot recognize Pipfile

Problem:    Cannot recognize Pipfile.
Solution:   Use existing filetypes. (Charles Ross, closes #4280)
diff --git a/src/version.c b/src/version.c
index 0b9a5df..f9b53b0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1187,
+/**/
     1186,
 /**/
     1185,