From e3aa60be6ae218cfca0b5974503e2378cdca98cb Mon Sep 17 00:00:00 2001
From: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue, 10 Dec 2019 23:09:04 -0500
Subject: [PATCH] requires xcode 10, apparently, for optional.

---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 6c32bb5..a093733 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 dist: bionic
+osx_image: xcode10
 language: cpp
 os:
   - osx