assert-call

It's used only as a dev dependency in 4 crates.

Depender (with downloads and own rev deps)			assert-call version
600		mcp-attr	dev	^0.1.2
490	1	jsoncall	dev	^0.1.2
260	1	sigwake	dev	^0.1.1
		sigmut	dev	^0.1.1