chore(deps): keep piet and piet-coregraphics in one pull request

[rldyourmnd]

#37 bumps piet 0.6.2 → 0.8.0 on its own and cannot merge. The macOS build fails with a dozen E0599s:

no method named `clear` found for struct `CoreGraphicsContext<'a>`
no method named `stroke` found for struct `CoreGraphicsContext<'a>`
no method named `fill` found for struct `CoreGraphicsContext<'a>`
no method named `draw_text` found for struct `CoreGraphicsContext<'a>`
no method named `finish` found for struct `CoreGraphicsContext<'a>`

Every one of those is a RenderContext method. They did not disappear from the API — piet-coregraphics stayed on 0.6.2 and pins an exact piet, so the graph carries piet 0.6.2 and piet 0.8.0 at once and CoreGraphicsContext implements the trait from the copy nothing else is using. The error names the symptom and never the cause.

This file argues, with reasons, that majors should not be grouped. This pair is the exception it does not cover: it is one decision, not two, and neither half compiles alone.

The Cargo.toml note also understated the cost. It said core-graphics 0.24 would be needed "if we use piet 0.7"; piet-coregraphics 0.8.0 requires core-graphics ^0.24 too, and this tree pins core-graphics = "0.22" under cocoa = "0.24". So the next piet bump is a coordinated macOS stack upgrade, not a dependency bump. The note now says that.

Closing #37 as unmergeable in its current shape; the group makes the next attempt arrive whole.

https://claude.ai/code/session_01Dhii8pMkUcUEWKjhDwxzAX