Update to ActiveRecord 5 and crate_ruby 0.2

Author: amotl

activerecord-crate-adapter.gemspec

@@ -44,11 +44,10 @@ Gem::Specification.new do |spec|
     "source_code_uri" => "https://github.com/crate/activerecord-crate-adapter"
   }
 
-  spec.add_development_dependency "bundler", "~> 1.5"
+  spec.add_development_dependency "bundler", "~> 2"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 2.14"
 
-  spec.add_dependency('activerecord', '~> 4.1.0')
-  spec.add_dependency('arel', '>= 5.0.0')
-  spec.add_dependency('crate_ruby', '~> 0.0.7')
+  spec.add_dependency('activerecord', '~> 5')
+  spec.add_dependency('crate_ruby', '~> 0.2')
 end

lib/active_record/connection_adapters/crate_adapter.rb

@@ -23,7 +23,7 @@
 require 'active_record/base'
 require 'active_record/base'
 require 'arel/arel_crate'
-require 'arel/visitors/bind_visitor'
+require 'arel/visitors/visitor'
 require 'active_support/dependencies/autoload'
 require 'active_support/callbacks'
 require 'active_support/core_ext/string'
@@ -77,7 +77,7 @@ def schema_creation # :nodoc:
       }
 
       class BindSubstitution < Arel::Visitors::Crate # :nodoc:
-        include Arel::Visitors::BindVisitor
+        include Arel::Visitors
       end
 
       def initialize(connection, logger, pool, config)

lib/arel/arel_crate.rb

@@ -21,4 +21,4 @@
 
 require 'arel'
 require 'arel/visitors/crate'
-require 'arel/visitors/bind_visitor'
+require 'arel/visitors/visitor'

lib/arel/visitors/crate.rb

@@ -27,5 +27,3 @@ class Crate < Arel::Visitors::ToSql
     end
   end
 end
-
-Arel::Visitors::VISITORS['crate'] = Arel::Visitors::Crate