.travis.yml in protocol-http-0.13.0 vs .travis.yml in protocol-http-0.13.1

- old
+ new

@@ -2,13 +2,13 @@
 dist: xenial
 cache: bundler
 
 matrix:
   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"