Jsonb Accessor Versions Save

Dropped support for old Ruby and Rails versions and a bug fix when using an array of date times.

No changes compared to 1.3.8. There was a problem with RubyGems and Java versions 1.3.8 and 1.3.9 were corrupted.

Fix support for ActiveRecord::Enum.

Bug fix: Datetime attributes were not correctly serialized

Attributes defined outside of jsonb_accessor are not written.

Fixes https://github.com/madeintandem/jsonb_accessor/issues/148

Bug fix: Raised ActiveModel::MissingAttributeError when model was initialized without the jsonb_accessor field

DateTime objects are now correctly converted to strings

Fixes the direct assignment of a jsonb field when store keys are used #134

Prevent initialization of the store hash with nil values

#133

Support for Ruby 3 and ActiveRecord 6.1