jzon v0.12.5

This is the first version of jzon which continues the unmaintained
json v0.12.4.

Features

• Implement IntoIterator for Object

• Add as_object() and as_array() methods

Bug Fixes

• Avoid zero initialization in Short

Refactor

• Update lifetimes of read_complex_string
• Fix a few typos

Documentation

• Rename to jzon
• Add this changelog

CI

• Add Github workflows