patch 8.0.1764: lgtm considers tutor.es to be EcmaScript

Problem:    Lgtm considers tutor.es to be EcmaScript.
Solution:   Add a config file for lgtm. (Bas van Schaik, closes #2844)
diff --git a/src/version.c b/src/version.c
index f5d4c5a..f918ac2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1764,
+/**/
     1763,
 /**/
     1762,