.travis.yml in protocol-http2-0.10.4 vs .travis.yml in protocol-http2-0.11.0

@@ -6,9 +6,10 @@
   include:
     - rvm: 2.3
     - rvm: 2.4
     - rvm: 2.5
     - rvm: 2.6
+    - rvm: 2.7    
     - rvm: 2.6
       env: COVERAGE=PartialSummary,Coveralls
     - rvm: truffleruby
     - rvm: jruby-head
       env: JRUBY_OPTS="--debug -X+O"