Support rails5.1 and rails 5.2

[pololee]

fix active_record.time_zone_aware_types error happen in 5.1 and 5.2

DEPRECATION WARNING: Time columns will become time zone aware in Rails 5.1. This still causes `String`s to be parsed as if they were in `Time.zone`, and `Time`s to be converted to `Time.zone`.

To keep the old behavior, you must add the following to your initializer:

    config.active_record.time_zone_aware_types = [:datetime]

To silence this deprecation warning, add the following:

    config.active_record.time_zone_aware_types = [:datetime, :time]

What does this even mean? I found an article explain it well http://engineering.liefery.com/2017/10/25/times-in-rails-5.html
Here is a quick summary:

Here’s a good way of thinking about it: which columns in your application should return an ActiveSupport::TimeWithZone object?

To keep the old behaviour and only have datetime columns return an ActiveSupport::TimeWithZone object, use [:datetime].
To use the new behaviour and have time columns also return an ActiveSupport::TimeWithZone object, use [:datetime, :time].

Here is where I found how to config it without Rails.config http://api.rubyonrails.org/classes/ActiveRecord/Timestamp.html

As the testcases suggest, it expects the old behaviour, i.e. only datetime is time zone aware.

validates_timeliness/spec/validates_timeliness/orm/active_record_spec.rb

Lines 90 to 105 in 4c80b40

	context 'for column attribute' do
	it 'should be detected from column type' do
	expect(klass.timeliness_attribute_timezone_aware?(:birth_date)).to be_falsey
	expect(klass.timeliness_attribute_timezone_aware?(:birth_time)).to be_falsey
	expect(klass.timeliness_attribute_timezone_aware?(:birth_datetime)).to be_truthy
	end
	end
	context 'for non-column attribute' do
	it 'should be detected from the validation type' do
	expect(klass.timeliness_attribute_timezone_aware?(:some_date)).to be_falsey
	expect(klass.timeliness_attribute_timezone_aware?(:some_time)).to be_falsey
	expect(klass.timeliness_attribute_timezone_aware?(:some_datetime)).to be_truthy
	end
	end
	end

I changed spec_helper.rb to set time_zone_aware_types, but I don't know how to enforce it in a Rails app. I am not familiar with gem and I am afraid this may break sth 😞

[pololee]

Update validates_timeliness to support Rails 5.2

[coveralls]

Coverage decreased (-0.4%) to 97.619% when pulling 089fe28 on supportRails52 into 4c80b40 on appfolio.