JSON3 and StructTypes compat for InterTypes

[olynch]

Addresses #83.

REGRESSION: The full range of 64 bit integers is no longer supported.

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (f520029) 91.05% compared to head (733ab18) 91.62%.

Files	Patch %	Lines
src/intertypes/jsonschema.jl	87.93%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #106      +/-   ##
==========================================
+ Coverage   91.05%   91.62%   +0.56%     
==========================================
  Files          22       22              
  Lines        2136     1910     -226     
==========================================
- Hits         1945     1750     -195     
+ Misses        191      160      -31     

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[olynch]

@jpfairbanks @fivegrant this is ready to review; let's get this merged.

[fivegrant]

IMO I think we should probably keep it as is since it somewhat matches the other parts of source:

• ACSets.jl/src/ACSetInterface.jl

  Line 63 in f520029

  function default_parts_type(::Type{PT}) where PT <: PartsType

• ACSets.jl/src/Defaults.jl

  Lines 8 to 18 in f520029

  	abstract type Default end
  	struct DefaultVal{x} <: Default
  	end
  	default(::Type{DefaultVal{x}}) where {x} = x
  	struct DefaultEmpty{T} <: Default
  	end
  	default(::Type{DefaultEmpty{T}}) where {T} = T()

• ACSets.jl/src/ColumnImplementations.jl

  Lines 20 to 23 in f520029

  	Base.convert(::Type{T}, x::T) where {T>:Union{Nothing,AttrVar}} = x
  	Base.convert(::Type{T}, x::T) where {T>:Union{Missing,AttrVar}} = x
  	Base.convert(::Type{T}, x::T) where {T>:AttrVar} = x
  	Base.convert(::Type{T}, x) where {T>:AttrVar} = convert(Base.typesplit(T, AttrVar), x)

  (extending a base function)

[fivegrant]

A counterargument though is that the platform-specific options can be contained in the JSONTarget struct instead of extra keywords.