From b00b6ace15a096454bb9c9766eef2bf946f99ec4 Mon Sep 17 00:00:00 2001
From: Jean-Luc Geering <jlgeering@users.noreply.github.com>
Date: Tue, 30 Jun 2020 14:09:44 +0200
Subject: [PATCH 1/2] Update .travis.yml

---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 0bfd26d..1144ff6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,11 @@ sudo: false
 elixir:
   - 1.6.6
   - 1.7.2
+  - 1.10.3
 otp_release:
   - 20.3
   - 21.0
+  - 23.0
 before_script:
   - mix deps.get --only test
 script:

From 048364a6b9bd55ee9af8957fb7823799427d7c93 Mon Sep 17 00:00:00 2001
From: Jean-Luc Geering <jlgeering@users.noreply.github.com>
Date: Tue, 30 Jun 2020 14:26:51 +0200
Subject: [PATCH 2/2] version matrix

---
 .travis.yml | 46 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 8 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 1144ff6..0f25945 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,43 @@
 language: elixir
 sudo: false
-elixir:
-  - 1.6.6
-  - 1.7.2
-  - 1.10.3
-otp_release:
-  - 20.3
-  - 21.0
-  - 23.0
+
+# see https://hexdocs.pm/elixir/master/compatibility-and-deprecations.html#compatibility-between-elixir-and-erlang-otp
+# and https://docs.travis-ci.com/user/languages/erlang/
+jobs:
+  include:
+    - elixir: 1.6.6
+      otp_release: 20.3.8
+    - elixir: 1.6.6
+      otp_release: 21.2
+
+    - elixir: 1.7.4
+      otp_release: 20.3.8
+    - elixir: 1.7.4
+      otp_release: 21.2
+    - elixir: 1.7.4
+      otp_release: 22.3.4
+
+    - elixir: 1.8.2
+      otp_release: 20.3.8
+    - elixir: 1.8.2
+      otp_release: 21.2
+    - elixir: 1.8.2
+      otp_release: 22.3.4
+
+    - elixir: 1.9.4
+      otp_release: 20.3.8
+    - elixir: 1.9.4
+      otp_release: 21.2
+    - elixir: 1.9.4
+      otp_release: 22.3.4
+
+    - elixir: 1.10.3
+      otp_release: 21.2
+    - elixir: 1.10.3
+      otp_release: 22.3.4
+    - elixir: 1.10.3
+      otp_release: 23.0.2
+
 before_script:
   - mix deps.get --only test
 script: