patch 8.2.0782: cannot build with Lua on MS-Windows

Problem:    Cannot build with Lua on MS-Windows.
Solution:   Add DLL symbol for luaL_Loadstring. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 641aa88..f047bde 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    782,
+/**/
     781,
 /**/
     780,