.travis.yml in mrkt-0.11.1 vs .travis.yml in mrkt-1.0.0

@@ -2,13 +2,12 @@
   global:
     - CC_TEST_REPORTER_ID=45cd2174f49b570406e294ff393d456c4ae8532cf16dd6430abb06d8a0722a28
     - COVERAGE=on
 language: ruby
 rvm:
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
-  - 2.6.0
+  - 2.5
+  - 2.6
+  - 2.7
 before_install:
   - gem update --system
   - bundle update --bundler
 before_script:
   - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter