Use rspec over rake

Author: tmilewski

.travis.yml

@@ -1,4 +1,4 @@
-bundler_args: --without development 
+bundler_args: --without development
 before_install:
   - gem update --system
   - gem update bundler
@@ -9,7 +9,6 @@ env:
 language: ruby
 rvm:
   - jruby-9000
-  - 2.2.9
   - 2.3.5
   - 2.4.4
   - 2.5.3
@@ -20,4 +19,6 @@ matrix:
     - rvm: jruby-head
     - rvm: ruby-head
   fast_finish: true
+script:
+  - rspec
 sudo: false

Rakefile

@@ -2,10 +2,7 @@
 
 require 'bundler/gem_tasks'
 require 'rubocop/rake_task'
-require 'rspec/core/rake_task'
-
-RSpec::Core::RakeTask.new(:spec)
 
 RuboCop::RakeTask.new
 
-task :default => :spec
+task :default => :rubocop