Update around broadcasting

[hyrodium]

Sorry for the late PR. This PR is related to this comment: https://github.com/JuliaGraphics/Luxor.jl/pull/295#issuecomment-1983474107.

Changes in this PR:

• Point(1,2) .+ 3 is now invalid.
  • Use Point(1,2) + Point(3,3) instead.
  • CHANGELOG.md is also updated.
• [Point(1,2), Point(4,1)] .+ Point(3,4) is now valid.
  • This change is profitable for reducing Ref in code.
    • i.e. we don't need Ref in between.(Ref(pt1), Ref(pt2), range).
    • I have also removed between methods introduced in https://github.com/JuliaGraphics/Luxor.jl/commit/90d006b539c611008d4a6112e9d7e3b752186788.
  • Historical note
    • On the latest release v3.8.0, [Point(1,2), Point(4,1)] .+ Point(3,4) was valid too.
    • After PR#294, [Point(1,2), Point(4,1)] .+ Point(3,4) turned invalid, and we needed to write [Point(1,2), Point(4,1)] .+ Ref(Point(3,4)) instead.
    • This PR reverts the broadcasting behavior, and [Point(1,2), Point(4,1)] + Point(3,4) is now valid.
    • Of course, [Point(1,2), Point(4,1)] .+ Ref(Point(3,4)) is also still valid.

[cormullion]

How’s this going?

[hyrodium]

I'm sorry that I did not have time for OSS in recent days. I will try updating this PR tomorrow! 💪

[hyrodium]

I think the dictionary order with Point should be also removed before releasing v4.

julia> Point(1,3) < Point(0,4)
false

julia> Point(1,3) < Point(2,1)
true

If you agree with that, I will fix this in another PR!

x-ref: https://github.com/JuliaGraphics/Luxor.jl/blob/master/test/point-arithmetic.jl#L46-L48

[cormullion]

Sure! Just let me know when you’ve finished all the changes you feel are important - then I can go ahead and make the 4.0 release.

[hyrodium]

This is ready for review!