Upgrade pyproject-toml to 0.13.4

[messense]

No description provided.

[messense]

I'm not sure how to update to use the new pep508_rs api in

maturin/src/develop.rs

Lines 154 to 171 in b39f8ca

	pkg.marker = pkg.marker.and_then(|marker| -> Option<MarkerTree> {
	match marker.clone() {
	MarkerTree::Expression(MarkerExpression {
	l_value: MarkerValue::Extra,
	operator: MarkerOperator::Equal,
	r_value: MarkerValue::QuotedString(extra_value),
	}) if &extra_value == extra => None,
	MarkerTree::And(and) => match &*and {
	[existing, MarkerTree::Expression(MarkerExpression {
	l_value: MarkerValue::Extra,
	operator: MarkerOperator::Equal,
	r_value: MarkerValue::QuotedString(extra_value),
	})] if extra_value == extra => Some(existing.clone()),
	_ => Some(marker),
	},
	_ => Some(marker),
	}
	});

and

maturin/src/metadata.rs

Lines 300 to 309 in b39f8ca

	let new_extra = MarkerTree::Expression(MarkerExpression {
	l_value: MarkerValue::Extra,
	operator: MarkerOperator::Equal,
	r_value: MarkerValue::QuotedString(extra.to_string()),
	});
	if let Some(existing) = dep.marker.take() {
	dep.marker = Some(MarkerTree::And(vec![existing, new_extra]));
	} else {
	dep.marker = Some(new_extra);
	}

@konstin please help, thanks!

[messense]

Oh looks like pep440_rs requires Rust 1.80 which is too new for our MSRV.