Add `squeeze()` to dynamic dimension arrays #208

Job	Run time
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
clippy/stable	20s
docs/${{ matrix.rust }}	0s
cargo-careful	0s
format/nightly	12s
nostd-build/thumbv6m-none-eabi/stable	10s
tests/stable	2m 41s
tests/beta	2m 55s
tests/nightly	3m 24s
tests/1.64.0	6m 4s
conclusion	1s
	15m 47s

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