assert-call

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

Depender (with downloads and own rev deps)			assert-call version
320		mcp-attr	dev	^0.1.2
230	1	jsoncall	dev	^0.1.2
150	1	sigwake	dev	^0.1.1
		sigmut	dev	^0.1.1