Travis: use Erlang 21.3, Elixir 1.8.1

deps/rabbitmq_trust_store/.travis.yml

@@ -18,7 +18,7 @@ addons:
       # Use Elixir from Erlang Solutions. The provided Elixir is
       # installed with kiex but is old. We also can't use kiex to
       # install a newer one because of GitHub API rate limiting.
-      - elixir=1.7.4-1
+      - elixir=1.8.1-1
 cache:
   apt: true
 env:
@@ -27,8 +27,8 @@ env:
     - secure: 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
 
 otp_release:
-  - "21.2"
-  
+  - "21.3"
+
 before_script:
   # The checkout made by Travis is a "detached HEAD" and branches
   # information is missing. Our Erlang.mk's git_rmq fetch method relies
@@ -45,7 +45,7 @@ before_script:
   - |
     echo YES | kiex implode
     elixir --version
-    elixir --version | grep -q 'Elixir 1.7.4'
+    elixir --version | grep -q 'Elixir 1.8.1'
 
 script:
   - make xref