patch 8.1.0183: Lua API changed, breaking the build

Problem:    Lua API changed, breaking the build.
Solution:   Adjust prototype of lua_rawgeti(). (Ken Takata,
            closes #3157, closes #3144)
diff --git a/src/version.c b/src/version.c
index 679aabd..0cda7a5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    183,
+/**/
     182,
 /**/
     181,