patch 8.1.2035: recognizing octal numbers is confusing

Problem:    Recognizing octal numbers is confusing.
Solution:   Introduce scriptversion 4: do not use octal and allow for single
            quote inside numbers.
diff --git a/src/version.c b/src/version.c
index 69c77d8..09baa53 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2035,
+/**/
     2034,
 /**/
     2033,