Discover (#217)

Add discover package and oj app discover option.

Anonymous embedded structs (#216)

Fix nested anonymous struct recomposing

Fix float parsing issue (#214)

Update changelog

Update changelog

Update release notes

Fix type decompose (#204)

Fix user defined jp unary operators

Identify field names that start with '_' as private

Lint (#201)

* Update linter to v2.0

* Add release notes