Test on Ruby 2.7 (#25)

* Test on Ruby 2.7

* Update bundler in Rails 5.0 gemfile for Ruby 2.7 support

* Lock bundler

* Try this to fix bundler

* Drop Ruby 2.1 and 2.2

* Remove 2.1 and 2.2 from matrix as well

Author: JasonBarnabe

.travis.yml

@@ -1,12 +1,11 @@
 language: ruby
 
 rvm:
-  - 2.1
-  - 2.2
   - 2.3.8
   - 2.4.8
   - 2.5.7
   - 2.6.5
+  - 2.7.0
 
 gemfile:
   - gemfiles/rails_5.0.gemfile
@@ -15,8 +14,6 @@ gemfile:
 
 matrix:
   exclude:
-    - rvm: 2.1
-      gemfile: gemfiles/rails_5.0.gemfile
     - rvm: 2.4.8
       gemfile: gemfiles/rails_4.1.gemfile
     - rvm: 2.4.8
@@ -29,6 +26,11 @@ matrix:
       gemfile: gemfiles/rails_4.1.gemfile
     - rvm: 2.6.5
       gemfile: gemfiles/rails_4.2.gemfile
+    - rvm: 2.7.0
+      gemfile: gemfiles/rails_4.1.gemfile
+    - rvm: 2.7.0
+      gemfile: gemfiles/rails_4.2.gemfile
 
 before_install:
   - if ruby --version | cut -d ' ' -f 2 | grep -q 2.1.5p273 ; then gem update --system 2.4.8; fi
+  - gem install bundler

gemfiles/rails_5.0.gemfile.lock

@@ -75,4 +75,4 @@ DEPENDENCIES
   simplecov
 
 BUNDLED WITH
-   1.15.0
+   2.1.4