Version 1.7.0

• Optimize performance with applying frozen_string_literal (by @skatkov)
• Drop the support of Ruby version lower than 2.3

Version 1.6.6

• Revive JRuby support with JrJackson instead of Oj

Version 1.6.5

• Fix the problem that data which is not a Hash or cannot respond to_hash is not output

Version 1.6.4

• Fix formatter to support time upto milliseconds
• Refactor formatters

Version 1.6.3

• Add Ougai::Formatters::Pino compatible with pino
• Refactor to unity the initialize arguments of Ougai::Formatters

Version 1.6.1

• Use Oj as JSON generator in Bunyan formatter
  • Converting decendant objects of data by their as_json, to_json or to_hash

Version 1.5.8

• Fixed formatter#call with data as string

Version 1.5.7

• Added formatter supports serialize_backtrace attribute

Version 1.5.6

• Fix that bunyan formatter initialize does not receive arguments
• Be faster

Version 1.5.5

• Support child method with a block (by @eropple)