.travis.yml in ajax-datatables-rails-0.4.3 vs .travis.yml in ajax-datatables-rails-1.0.0

@@ -1,57 +1,18 @@
 dist: trusty
 language: ruby
 sudo: required
 cache: bundler
 rvm:
-  - 2.2.10
   - 2.3.7
+  - 2.4.4
+  - 2.5.1
 gemfile:
-  - gemfiles/rails_4.0.13.gemfile
-  - gemfiles/rails_4.1.16.gemfile
   - gemfiles/rails_4.2.10.gemfile
   - gemfiles/rails_5.0.7.gemfile
   - gemfiles/rails_5.1.6.gemfile
   - gemfiles/rails_5.2.0.gemfile
-matrix:
-  include:
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_4.2.10.gemfile
-      env: DB_ADAPTER=postgresql
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.0.7.gemfile
-      env: DB_ADAPTER=postgresql
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.1.6.gemfile
-      env: DB_ADAPTER=postgresql
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.2.0.gemfile
-      env: DB_ADAPTER=postgresql
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_4.2.10.gemfile
-      env: DB_ADAPTER=mysql2
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.0.7.gemfile
-      env: DB_ADAPTER=mysql2
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.1.6.gemfile
-      env: DB_ADAPTER=mysql2
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.2.0.gemfile
-      env: DB_ADAPTER=mysql2
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_4.2.10.gemfile
-      env: DB_ADAPTER=oracle_enhanced
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.0.7.gemfile
-      env: DB_ADAPTER=oracle_enhanced
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.1.6.gemfile
-      env: DB_ADAPTER=oracle_enhanced
-    - rvm: 2.4.4
-      gemfile: gemfiles/rails_5.2.0.gemfile
-      env: DB_ADAPTER=oracle_enhanced
 after_success:
   - bundle exec codeclimate-test-reporter
 services:
   - postgresql
   - mysql
@@ -75,6 +36,10 @@
     - ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe
     - ORACLE_SID=XE
   matrix:
     - DB_ADAPTER=postgresql
     - DB_ADAPTER=mysql2
+    - DB_ADAPTER=sqlite3
     - DB_ADAPTER=oracle_enhanced
+matrix:
+  allow_failures:
+    - env: DB_ADAPTER=oracle_enhanced