Update to munit 1.0.0-M5

[armanbilge]

• Add support for JSDOM to JSIO scalameta/munit#529

This fixes the lack of MUnit error-reporting, but only for the JSDOM environment which we are currently using for scoverage.

We could make JSDOM the default test environment for local development. In theory this could make debugging failed tests easier, although that should be weighed against the possibility that JSDOM isn't always a faithful representation of browser APIs e.g.

scala-js-snabbdom/snabbdom/src/test/scala/snabbdom/ThunkSuite.scala

Lines 176 to 180 in 21499a5

	vnode0.test("supports leaving out the `key` argument") { vnode0 =>
	assume(
	!dom.window.navigator.userAgent.contains("jsdom"),
	"This test is broken on JSDOM"
	)