From 4faba37fa16ffabb290afa9251e0b8259d1f7496 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Eduardo=20Montenegro=20Cavalcanti=20de=20Olive?=
 =?UTF-8?q?ira?= <jose.eduardo.mco@gmail.com>
Date: Mon, 1 Jun 2020 14:26:31 -0300
Subject: [PATCH 1/2] Adds explicit version declarations

---
 .travis.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 6fde9c4a..c89e6b05 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,13 @@ _native_job: &native_job
 
 language: shell
 
+os: linux
+
+dist: xenial
+
+# This is the default xcode version. The Xcode version defines what
+osx_image: xcode9.4
+
 jobs:
   - <<: *native_job
     name: default Ubuntu
@@ -15,3 +22,4 @@ jobs:
   - <<: *native_job
     name: MacOS
     os: osx
+ 

From 9e41386a04eb983d6a2e1b18d6637fc416765812 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Eduardo=20Montenegro=20Cavalcanti=20de=20Olive?=
 =?UTF-8?q?ira?= <jose.eduardo.mco@gmail.com>
Date: Mon, 1 Jun 2020 14:40:42 -0300
Subject: [PATCH 2/2] Update .travis.yml

---
 .travis.yml | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index c89e6b05..12d5e15e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,14 +12,20 @@ os: linux
 
 dist: xenial
 
-# This is the default xcode version. The Xcode version defines what
-osx_image: xcode9.4
-
 jobs:
   - <<: *native_job
-    name: default Ubuntu
-    os: linux
+    name: Ubuntu 16.04
+  
   - <<: *native_job
-    name: MacOS
+    name: Ubuntu 18.04
+    dist: bionic
+    
+  - <<: *native_job
+    name: MacOS xcode9.4
     os: osx
- 
+    osx_image: xcode9.4 # Default xcode on Travis.
+    
+  - <<: *native_job
+    name: MacOS xcode11.5
+    os: osx
+    osx_image: xcode11.5 # Latest xcode on Travis.