Let tifffile.imread handle additional keyword arguments

[cgohlke]

Description

Checklist

• Docstrings for all functions
• Gallery example in ./doc/examples (new features only)
• Benchmark in ./benchmarks, if your changes aren't covered by an
  existing benchmark
• Unit tests
• Clean style in the spirit of PEP8

For reviewers

• Check that the PR title is short, concise, and will make sense 1 year
  later.
• Check that new functions are imported in corresponding __init__.py.
• Check that new features, API changes, and deprecations are mentioned in
  doc/release/release_dev.rst.

[rfezzani]

@cgohlke, thank you! Just adding a test would be perfect 😉

[cgohlke]

I think this is already tested:

scikit-image/skimage/io/tests/test_tifffile.py

Lines 40 to 44 in dde036a

	def test_tifffile_kwarg_passthrough ():
	img = imread(fetch('data/multipage.tif'), key=[1],
	multifile=False, multifile_close=True, fastij=True,
	is_ome=True)
	assert img.shape == (15, 10), img.shape

[emmanuelle]

Thank you so much @cgohlke. We really appreciate your help.