apply Polars SQL count(*) group by fix

[jqnatividad]

pola-rs/polars#16465

[alexander-beedie]

FYI: new release 0.20.30 contains the fix ✌️

[jqnatividad]

Thanks @alexander-beedie !

I ended up using patch.crates.io to get the fix...

qsv/Cargo.toml

Lines 244 to 254 in ec5f653

	[patch.crates-io]
	# needed as dynfmt doesn't work in release mode without this
	dynfmt = { git = "https://github.com/jqnatividad/dynfmt", branch = "2021-clippy_ptr_as_ptr-bumpdeps" }
	# needed to get latest dependencies and unreleased fixes
	grex = { git = "https://github.com/pemistahl/grex", rev = "0c8ab87" }
	# use our fork of calamine to use latest zip 2.1 crate
	# which has better performance and several bug fixes
	calamine = { git = "https://github.com/jqnatividad/calamine", branch = "bump_zip_from_1_to_2" }
	# polars 0.40.0 with unreleased fixes
	polars = { git = "https://github.com/pola-rs/polars", rev = "d68d499" }
	polars-ops = { git = "https://github.com/pola-rs/polars", rev = "d68d499" }

Will be sure to spread the Polars' love at csvconf!