.travis.yml in lazy_migrate-0.2.0 vs .travis.yml in lazy_migrate-0.3.0

@@ -3,5 +3,11 @@
 language: ruby
 cache: bundler
 rvm:
   - 2.6.3
 before_install: gem install bundler -v 2.0.2
+gemfile:
+  - gemfiles/rails_5_1_5.gemfile
+  - gemfiles/rails_5_2_4_3.gemfile
+  - gemfiles/rails_6_0_3_4.gemfile
+matrix:
+  fast_finish: true