chore: drop old rubies

.drone.yml

@@ -33,24 +33,6 @@ spec_step_common: &spec_step_common
     - dip rspec
 
 steps:
-  - name: Tests Ruby 2.2
-    environment:
-      COMPOSE_FILE_EXT: drone
-      DOCKER_RUBY_VERSION: 2.2
-      RUBY_IMAGE_TAG: 2.2-latest
-      REDIS_IMAGE_TAG: 4-alpine
-      RAILS_ENV: test
-    <<: *spec_step_common
-
-  - name: Tests Ruby 2.3
-    environment:
-      COMPOSE_FILE_EXT: drone
-      DOCKER_RUBY_VERSION: 2.3
-      RUBY_IMAGE_TAG: 2.3-latest
-      REDIS_IMAGE_TAG: 4-alpine
-      RAILS_ENV: test
-    <<: *spec_step_common
-
   - name: Tests Ruby 2.4
     environment:
       COMPOSE_FILE_EXT: drone

Appraisals

@@ -1,17 +1,3 @@
-if RUBY_VERSION < '2.4'
-  appraise 'rails3.2' do
-    gem 'rails', '~> 3.2.0'
-  end
-
-  appraise 'rails4.0' do
-    gem 'rails', '~> 4.0.13'
-  end
-
-  appraise 'rails4.1' do
-    gem 'rails', '~> 4.1.16'
-  end
-end
-
 appraise 'rails4.2' do
   gem 'rails', '~> 4.2.9'
 end
@@ -26,5 +12,4 @@ end
 
 appraise 'rails5.2' do
   gem 'rails', '~> 5.2.0', '< 5.2.4.1'
-  gem 'mimemagic', '<= 0.3.9' if RUBY_VERSION < '2.3'
 end

dip.yml

@@ -1,8 +1,8 @@
 version: '1'
 
 environment:
-  DOCKER_RUBY_VERSION: 2.3
-  RUBY_IMAGE_TAG: 2.3-latest
+  DOCKER_RUBY_VERSION: 2.4
+  RUBY_IMAGE_TAG: 2.4-latest
   REDIS_IMAGE_TAG: 4-alpine
   COMPOSE_FILE_EXT: development
   RAILS_ENV: test
@@ -40,6 +40,5 @@ interaction:
 provision:
   - docker volume create --name bundler_data
   - dip bundle config --local https://gems.railsc.ru/ ${APRESS_GEMS_CREDENTIALS}
-  - dip clean
   - dip bundle install
   - dip appraisal install