v6.4.1

Use URI.open in ruby > 2.5 PR (#45)

v6.4.0

• Fix Ruby 2.7 method & syntax deprecation warnings (#38)

v6.3.0

• Add validation_errors_to option - customize copying of errors (#26)
• Dropped support for ruby 2.1

v6.2.2

Add support for Aliases in S3 credentials YAML (accidentally removed during 6.2.0 upgrade).

v6.2.1

Fix auto-loading of the gem code (necessitated due to change in gem name).

v6.2.0

• Fix bug where post-processing was done on invalid attachments (#16).
• Use AWS::S3 built in download_file method (#9).
• Rubocop recommended syntax updates (#10, #11, #13, #14).
• Testing - replace mocha and bourne with rspec mocks (#6).
• Fix test suite to run with Rails 5 and Rails 6 (#19, #20, #7).