Update travis (#14)

* Support ActiveRecord 6.0

* Update bundle install in tarvis for Ruby 2.2 support drop

* Install fixed-version sqlite3 in travis

* Allow failures for invalid version combinations

* Drop Ruby 2.3 support

.travis.yml

@@ -1,41 +1,38 @@
 language: ruby
 sudo: false
 rvm:
-  - 2.2
-  - 2.3
   - 2.4
   - 2.5
   - 2.6
 env:
+  jobs:
   -
-  - ACTIVE_RECORD_VERSION=4.0.0
-  - ACTIVE_RECORD_VERSION=4.1.0
-  - ACTIVE_RECORD_VERSION=4.2.0
-  - ACTIVE_RECORD_VERSION=5.0.0
+  - ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
+  - ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
+  - ACTIVE_RECORD_VERSION=4.2.0 SQLITE3_VERSION=1.3.13
+  - ACTIVE_RECORD_VERSION=5.0.0 SQLITE3_VERSION=1.3.13
+  - ACTIVE_RECORD_VERSION=6.0.0
 matrix:
   allow_failures:
     - rvm: 2.4
-      env: ACTIVE_RECORD_VERSION=4.0.0
+      env: ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.4
-      env: ACTIVE_RECORD_VERSION=4.1.0
+      env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.5
-      env: ACTIVE_RECORD_VERSION=4.0.0
+      env: ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.5
-      env: ACTIVE_RECORD_VERSION=4.1.0
+      env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.6
-      env: ACTIVE_RECORD_VERSION=4.0.0
+      env: ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.6
-      env: ACTIVE_RECORD_VERSION=4.1.0
+      env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
+    - rvm: 2.4
+      env: ACTIVE_RECORD_VERSION=6.0.0
 before_install:
   - gem update --system
   - gem --version
 install:
-  # Bundler v2 only supports Ruby v2.3 and above
-  # For Ruby v2.2, install Bundler v1.x
-  - if [ $TRAVIS_RUBY_VERSION == "2.2" ];
-    then gem install bundler -v '< 2';
-    else gem install bundler;
-    fi
+  - gem install bundler
   - bundle --version
   - bundle install --jobs=3 --retry=3
 script:

Gemfile

@@ -6,3 +6,4 @@ gem 'gem-release'
 gem 'pry'
 
 gem 'activerecord', "~> #{ENV['ACTIVE_RECORD_VERSION']}" if ENV['ACTIVE_RECORD_VERSION'].to_s != ''
+gem 'sqlite3', "~> #{ENV['SQLITE3_VERSION']}" if ENV['SQLITE3_VERSION'].to_s != ''