v5.2.2: Feature/5.2.2 (#15)

* Update travis, add ruby 2.5

* Fix travis ruby 2.5

* Test pg 1.0 with ActiveRecord 5.2

* Fixes bug #280

* Improve .parse_sql_types

* Remove unnecessary `params.size` if/else
* Add type tests

* Update history

* Version 5.2.1

* Update appraisal

* Fix deprecated mocha require

* Update travis, fix 2.5

* Update cops

* Add frozen_string_literal comments

* Re-generate rubocop todo file

* [style] LineLength

* Use ENV to configure test database connection

Use the same defaults, but allow overriding with any of these:

PGHOST
PGDATABASE
PGPORT
PGUSER
PGPASSWORD

* Remove :nodoc: from test classes

* Improve spatial queries tests

* Ignore multipoint query for PG10 (for now)
* Add helpers to query database version

* Fix task tests for PG 10

* Use #assert_includes for better feedback

* Test with pg gem version 1.x

* Test with PG 10, PostGIS 2.4 on travis

* Version 5.2.2

* prepare for update

* rubocop

* Merge tag 'v5.2.2' into feature/5.2.2

Version 5.2.2

# Conflicts:
#	.rubocop.yml
#	.rubocop_todo.yml
#	.travis.yml
#	Gemfile
#	History.md
#	activerecord-postgis-adapter.gemspec
#	gemfiles/ar51.gemfile
#	gemfiles/ar52.gemfile
#	lib/active_record/connection_adapters/postgis/column_methods.rb
#	lib/active_record/connection_adapters/postgis/create_connection.rb
#	lib/active_record/connection_adapters/postgis/databases.rake
#	lib/active_record/connection_adapters/postgis/oid/spatial.rb
#	lib/active_record/connection_adapters/postgis/postgis_database_tasks.rb
#	lib/active_record/connection_adapters/postgis/railtie.rb
#	lib/active_record/connection_adapters/postgis/schema_statements.rb
#	lib/active_record/connection_adapters/postgis/setup.rb
#	lib/active_record/connection_adapters/postgis/spatial_column.rb
#	lib/active_record/connection_adapters/postgis/spatial_column_info.rb
#	lib/active_record/connection_adapters/postgis/spatial_table_definition.rb
#	lib/active_record/connection_adapters/postgis/version.rb
#	lib/active_record/connection_adapters/postgis_adapter.rb
#	lib/activerecord-postgis-adapter.rb
#	test/database.yml
#	test/setup_test.rb
#	test/spatial_queries_test.rb
#	test/tasks_test.rb
#	test/test_helper.rb
#	test/type_test.rb