Remove support for obsolete Ruby, ActiveRecord

Their maintainers don't support them, why should we?

.travis.yml

@@ -5,37 +5,20 @@ rvm:
   - "2.3.1"
   - "2.2"
   - "2.1"
-  - "2.0"
-  - "1.9"
-  - jruby-19mode
-  - jruby-9.0.0.0
+  - jruby-9.0.5.0
 
 env:
   - ACTIVE_RECORD_BRANCH="master"
   - ACTIVE_RECORD_BRANCH="4-2-stable"
-  - ACTIVE_RECORD_BRANCH="4-1-stable"
-  - ACTIVE_RECORD_BRANCH="4-0-stable"
   - ACTIVE_RECORD_VERSION="~> 4.2.0"
-  - ACTIVE_RECORD_VERSION="~> 4.1.0"
-  - ACTIVE_RECORD_VERSION="~> 4.0.0"
-  - ACTIVE_RECORD_VERSION="~> 3.2.0"
-  - ACTIVE_RECORD_VERSION="~> 3.1.0"
 
 matrix:
   allow_failures:
     - env: ACTIVE_RECORD_BRANCH="master"
     - env: ACTIVE_RECORD_BRANCH="4-2-stable"
-    - env: ACTIVE_RECORD_BRANCH="4-1-stable"
-    - env: ACTIVE_RECORD_BRANCH="4-0-stable"
   exclude:
-    - rvm: "1.9"
-      env: ACTIVE_RECORD_BRANCH="master"
-    - rvm: "2.0"
-      env: ACTIVE_RECORD_BRANCH="master"
     - rvm: "2.1"
       env: ACTIVE_RECORD_BRANCH="master"
-    - rvm: jruby-19mode
-      env: ACTIVE_RECORD_BRANCH="master"
     - rvm: jruby-9.0.0.0
       env: ACTIVE_RECORD_BRANCH="master"
 

README.md

@@ -18,54 +18,33 @@ Read the blog post introducing PgSearch at http://blog.pivotal.io/labs/labs/pg-s
 
 ## REQUIREMENTS
 
-*   Ruby 1.9.2, 2.0, or later
-*   Active Record 3.1, 3.2, 4.0 or later
+*   Ruby 2.1+
+*   ActiveRecord 4.1+
 *   PostgreSQL
 *   [PostgreSQL contrib packages for certain
     features](https://github.com/Casecommons/pg_search/wiki/Installing-Postgres-Contrib-Modules)
 
+### Ruby 1.9, 2.0; ActiveRecord 3.1, 3.2, 4.0, 4.1
 
-## INSTALL
-
-```bash
-$ gem install pg_search
-```
-
-### Rails 3.1, 3.2, 4.0 or later, Ruby 1.9.2, 2.0, or later
+These may work with the current PgSearch, however they are unsupported by their maintainers and thus we do not actively support them.
 
-In Gemfile
+### Ruby 1.8.7
 
-```ruby
-gem 'pg_search'
-```
+Use PgSearch ~> 0.6.4 (not supported).
 
 ### Rails 3.0
 
-The newest versions of PgSearch no longer support Rails 3.0. However, the 0.5
-series still works. It's not actively maintained, but submissions are welcome
-for backports and bugfixes.
-
-```ruby
-gem 'pg_search', "~> 0.5.7"
-```
-
-The 0.5 branch lives at
-https://github.com/Casecommons/pg_search/tree/0.5-stable
+Use PgSearch 0.5.x (not supported).
 
-### Rails 2
+### Rails 2.x
 
-The newest versions of PgSearch no longer support Rails 2. However, the 0.2
-series still works. It's not actively maintained, but submissions are welcome
-for backports and bugfixes.
+Use PgSearch 0.2.x (not supported).
 
-```ruby
-gem 'pg_search', "~> 0.2.0"
-```
+## INSTALL
 
-The 0.2 branch lives at
-https://github.com/Casecommons/pg_search/tree/0.2-stable
+Install as usual: `gem install pg_search` or add `gem 'pg_search'` to your Gemfile.
 
-### Other Active Record projects
+### Non-Rails projects
 
 In addition to installing and requiring the gem, you may want to include the
 PgSearch rake tasks in your Rakefile. This isn't necessary for Rails projects,
@@ -75,19 +54,6 @@ which gain the Rake tasks via a Railtie.
 load "pg_search/tasks.rb"
 ```
 
-### Ruby 1.8.7 or earlier
-
-The newest versions of PgSearch no longer support Ruby 1.8.7. However, the 0.6
-series still works. It's not actively maintained, but submissions are welcome
-for backports and bugfixes.
-
-```ruby
-gem 'pg_search', "~> 0.6.4"
-```
-
-The 0.6 branch lives at
-https://github.com/Casecommons/pg_search/tree/0.6-stable
-
 ## USAGE
 
 To add PgSearch to an Active Record model, simply include the PgSearch module.