Update dependency postcss-custom-properties to v13.3.0

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-custom-properties (source)	13.1.5 -> 13.3.0

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Release Notes

csstools/postcss-plugins (postcss-custom-properties)

v13.3.0

Compare Source

July 24, 2023

• Added: support for :where(html) and :where(:root) selectors
• Fixed: cascade layers support
• Updated @csstools/css-tokenizer to 2.2.0 (minor)
• Updated @csstools/css-parser-algorithms to 2.3.1 (patch)
• Updated @csstools/cascade-layer-name-parser to 1.0.4 (patch)

v13.2.1

Compare Source

July 3, 2023

• Updated @csstools/css-parser-algorithms to 2.3.0 (minor)
• Updated @csstools/cascade-layer-name-parser to 1.0.3 (patch)

v13.2.0

Compare Source

June 1, 2023

• Do not generate fallback values when the rule is wrapped in @supports (top: var(--f)).

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