.travis.yml in build-environment-1.1.5 vs .travis.yml in build-environment-1.2.0

@@ -6,15 +6,7 @@
   include:
     - rvm: 2.3
     - rvm: 2.4
     - rvm: 2.5
     - rvm: 2.6
-    - rvm: truffleruby
-    - rvm: jruby-head
-      env: JRUBY_OPTS="--debug -X+O"
-    - rvm: ruby-head
-    - rvm: rbx-3
-  allow_failures:
-    - rvm: ruby-head
-    - rvm: truffleruby
-    - rvm: jruby-head
-    - rvm: rbx-3
+    - rvm: 2.6
+      env: COVERAGE=BriefSummary,Coveralls