Updates; kas_view;

[dhardy]

Dependencies updated: ron, usvg, resvg.

Dependency removed: stack_dst. Box<dyn ..> is a simpler alternative and there are no obvious performance issues, so I conclude that use of stack_dst was a premature optimization. (Also quite unsafe!)

#[widget { derive = self.foo; }] now supports partial trait implementations.

Bump MSRV to 1.62.0.

examples/sync-counter.rs: use only a Spinner widget (simpler code).

Revise drivers:

• Rename DefaultView → View, DefaultNav → NavView
• Move event::Config impl to driver::EventConfig

Use Cargo features stabilized in 1.60.0:

• Weak dependencies: serde no longer implies winit
• Namespaced dependencies: rename dep_ron to ron using dep:ron
• Namespaced dependencies: make features explicit, not implicit from optional dependencies
• Replace canvas and svg features with tiny-skia and resvg, the latter including the Canvas widget; adjust how the import looks in kas doc

Crates:

• Bump all versions to 0.11
• New kas_view crate from the contents of kas::widgets::view; this is now exported as kas::view
• Revise doc for model/view

[dhardy]

CI failed on nightly due to: NotIntMan/inplace_it#10