Custom style properties prevent MQ from rendering components

As per title, mithril query fails to render components that are passed custom style properties via mithril js syntax. For instance, declaring a component with mq such as:

const someComp = mq(someComp, { attr1: true, attr2: false, style: {"--testVar": 12}});

or within the component view such as:

return m("some-name", { style: { "--testVar": 12}}, [childrenHere...]);

...will cause the following error when running tests

TypeError: Cannot read properties of undefined (reading 'type')

However, setting up the same functionality in the same way, but adding the properties via js inside the component view()/oncreate() causes no issues.

document.querySelector(".someComp").style.setProperty("--testVar", 12);

``

Start by reproducing the failure with the mq(...) examples and the style objects shown in the issue, then trace the component rendering path that produces the undefined type error. Compare custom style properties passed through mq and through the component view; done means both forms render without the TypeError and the regression is covered by a test.