Merge branch 'layout-lifetimes' into 'master'

Glyph lifetimes for Font::glyphs_for & Font::layout

See merge request !158
8 jobs for master in 7 minutes and 30 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #28431
build:nightly:gpu_cache

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passed #28433
build:no_std

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passed #28432
build:redox

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passed #28429
build:stable

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passed #28430
build:stable:gpu_cache

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  Test
passed #28436
test:dev

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passed #28434
test:stable

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passed #28435
test:stable:gpu_cache

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