Things to clean up in v2.0

Formatting

I can't deal with code that isn't formatted anymore.

Tests

Get back to 100% code coverage (or as near to it as possible). There is currently a bunch of untested code.

Code style

There are many isa when we can use dispatch. Here's one example:

https://github.com/JuliaIO/JSONSchema.jl/blob/3c5bb85319b955ee24d6f0f5bf9f6b942c95eefc/src/schema.jl#L70-L73

I don't know what the point of this part is

https://github.com/JuliaIO/JSONSchema.jl/blob/3c5bb85319b955ee24d6f0f5bf9f6b942c95eefc/src/schema.jl#L302-L304

Surely it's just T <: Integer

Split schema validation and schema generation

There are really two separate things here. The current file is a bit confusing to me

The validation code

v2 has changed how we structure the validation code. I used to use dispatch to separate out each thing in the schema:

https://github.com/JuliaIO/JSONSchema.jl/blob/3e0177448fbf168018306086c851fcbf853af7ec/src/validation.jl#L138-L151

This made it easy to reason about what parts of the schema were covered and not. I think it's a shame to loose that.

Read src/schema.jl and src/validation.jl, starting with the linked isa checks and the existing validation structure. Inventory the formatting, coverage, dispatch, and schema-splitting concerns before proposing scope; done requires an agreed design plus corresponding changes and tests.