.travis.yml in async-rest-0.10.1 vs .travis.yml in async-rest-0.12.0

@@ -5,15 +5,17 @@
 matrix:
   include:
     - rvm: 2.4
     - rvm: 2.5
     - rvm: 2.6
+    - rvm: 2.6
+      gemfile: gems/event.gemfile
+    - rvm: 2.6
+      env: COVERAGE=PartialSummary,Coveralls
     - rvm: jruby-head
       env: JRUBY_OPTS="--debug -X+O"
     - rvm: truffleruby
     - rvm: ruby-head
-    - rvm: rbx-3
   allow_failures:
+    - rvm: truffleruby
     - rvm: ruby-head
     - rvm: jruby-head
-    - rvm: rbx-3
-    - rvm: truffleruby