Ease installation version restrictions

[mgxd]

Since 1.4.2, we are now pinning many packages to a compatible release during our python install

niworkflows/setup.cfg

Lines 27 to 45 in 171bf7c

	install_requires =
	attrs
	jinja2
	matplotlib ~= 3.3.1
	nibabel ~= 3.0
	nilearn >= 0.5.2
	nipype ~= 1.5
	nitransforms ~= 21.0.0
	numpy
	packaging
	pandas
	pybids >= 0.11.1
	PyYAML
	scikit-image
	scipy
	seaborn
	svgutils >= 0.3.4
	transforms3d
	templateflow >= 0.6

I think this is a bit too strict, and is causing some problems (see https://readthedocs.org/projects/nibabies/builds/15025827/)