string_of_dimensions is missing a space on native

[purefunctor]

Native:

styled-ppx/packages/css/native/Css_Js_Core.ml

Lines 1679 to 1680 in 0f3e805

	and string_of_dimensions dimensions =
	dimensions |. Std.Array.map gridLengthToJs |. Std.Array.joinWith ~sep:{js||js}

JS:

styled-ppx/packages/css/js/Css_Js_Core.ml

Lines 1728 to 1731 in 0f3e805

	and string_of_dimensions dimensions =
	dimensions
	|. Std.Array.map gridLengthToJs
	|. Std.Array.joinWith ~sep:{js| |js}

[davesnx]

Fixed in main. Thanks for reporting @purefunctor