patch 8.0.1187: building with lua fails for OSX on Travis

Problem:    Building with lua fails for OSX on Travis.
Solution:   Separate brew-update and brew-install. (Ozaki Kiichi, closes #2203)
diff --git a/src/version.c b/src/version.c
index 398a668..f1ab827 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1187,
+/**/
     1186,
 /**/
     1185,