Target-specific features not supported by Cargo

[ankane]

Hi, hope your year is off to a good start.

Cargo doesn't currently support target-specific features (rust-lang/cargo#1197), so the pattern used in #1297 ends up enabling both the compile-time-rng and runtime-rng features of ahash on all platforms.

arrow2/Cargo.toml

Lines 100 to 106 in 211be21

	# faster hashing
	[target.'cfg(target_arch = "wasm32")'.dependencies]
	ahash = { version = "0.8", features=["compile-time-rng"] }
	getrandom = { version = "0.2", features = ["js"] }
	[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
	ahash = { version = "0.8", features=["runtime-rng"] }

This pulls in the dependencies for both on all platforms.

[hzuo]

Should be fixed by #1407

[ankane]

Thanks @hzuo!