Update Rust crate taffy to 0.7.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
taffy	dependencies	minor	0.4.3 -> 0.7.0

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Release Notes

DioxusLabs/taffy (taffy)

v0.7.0

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Changed

• BREAKING: The cache_mut method on the LayoutPartialTree trait has been replaced with a separate CacheTree trait. This allows
  Taffy to be more easily used without caching or with a custom cache implementation.
• BREAKING: the TaffyTree::set_children method now removes the children from their previous parent (if they have one).

Added

• Helper methods to retrieve content-box sizes were added to Layout

v0.6.3

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Fixes

• Block: ignore margin collapsing when computing static position of abspos items (#​747)

v0.6.2

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Fixes

• Fix: clamp indefinite available space by min- and max- size as appropriate (#​742)

v0.6.1

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Fixes

• Fix calculation of auto-fill/auto-fit repetition count when container has a definite percentage size (#​722)
• Fix min-size style not affecting intrinsic sizes (#​723)
• Fix documentation of dirty and mark_dirty functions (#​724)
• Fix intrinsic size of scroll containers that have a small explicit flex-basis (#​728)

v0.6.0

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Highlights

• The Style struct has been "traitified". This supports Taffy's integration in Servo and generally makes Taffy more flexible. The
  Style struct still exists and implements the new traits so existing uses of Taffy will continue to work as before.
• The box-sizing style is supported
• Computed margins are output in Layout

Fixes

• Fix print_tree() when rounding is disabled (#​680)
• Absolute Insets should be resolved against the container size minus border (#​666)
• Fix flooring hypothetical_main_size by computed min size (#​689)
• Fix flex line cross-size determination (#​690)
• Fix panics in the grid algorithm (#​691)
• Fix resolving flexible lengths (WPT css/flexbox-multiline-min-max test) (#​692)
• Fix wrapping when a max main size style is present (#​694)
• Fix case where Taffy allowed margins to collapse through an element when it shouldn't have (#​695)

Added

• Legacy text align (for laying out <center> and <div align="..">) is supported
• Add is_table for block items (#​701)
• Impl Debug and Clone for Cache (#​688)
• Implement Debug and PartialEq for tree types (#​697)

v0.5.2

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• Fix block stretch sizing (don't always apply stretch sizing to block containers) (#​674)
• Fix computation of intrinsic main size when it depends on a child's known cross size (#​673)
• Fix panic when GridLine 0 is specified (#​671)
• Docs: Document feature flags and scrape examples (#​672)
• Docs: Update cosmic-text example to cosmic-text 0.12 (#​670)

v0.5.1

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• Fix: Clamp block item stretch widths by their min and max width (#​664)
• Fix: Auto margin computation in block layout (#​663)

v0.5.0

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The changes in 0.5 are relatively small but the new measure function parameter is a breaking change so it requires a minor version bump.

• Added: A style: &Style parameter has been added to measure functions.
• Added: The MaybeMath, MaybeResolve, and ResolveOrZero traits have been made public.
• Fix: use SizingMode::Inherent when sizing absolute children of flexbox nodes.

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Release Notes:

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