patch 8.1.0655: when appending a line text property flags are not added

Problem:    When appending a line text property flags are not added.
Solution:   Add text properties to a newly added line.
diff --git a/src/version.c b/src/version.c
index ec65db4..42ae469 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    655,
+/**/
     654,
 /**/
     653,