New sizing value stretch fails validation

[binury]

Amended syntax

  syntax: auto | <length> | <percentage> | min-content | max-content | fit-content | fit-content( <length-percentage> ) | stretch | contain

Source - https://drafts.csswg.org/css-sizing-4/#sizing-values

MDN - https://developer.mozilla.org/en-US/docs/Web/CSS/height#browser_compatibility

[binury]

It seems like this should have been added here 36a2a6d
and the current version of the file retains the stretch rule exception as well

csstree/data/patch.json

Lines 330 to 332 in 36a2a6d

	"height": {
	"syntax": "| stretch | <-non-standard-size>"
	},

but the validator will not accept stretch 🤔

Unique properties: 0
Unique declarations: 4 (total: 6)
  ✓ Valid:   3 (75.00%)
  ✗ Invalid: 1 (25.00%)
      1 × Mismatch
Mismatch × 3
  syntax: auto | <length> | <percentage> | min-content | max-content | fit-content | fit-content( <length-percentage> )
  height: stretch
  --------^

edit: I suppose it is possible that this is due to an outdated version of csstree being used but admittedly at the time of op I was not able to confirm the versions used