https access fix

[ayushnag]

• Closes open_virtual_dataset HTTPS access fails #195
• Tests passing

[TomAugspurger]

Thanks for tracking this down. I think that at

VirtualiZarr/virtualizarr/tests/test_xarray.py

Line 379 in 5d08519

vds = open_virtual_dataset(url, reader_options={}, indexes={})

, the reader_options={} can be removed and act as a test for this.

[TomNicholas]

Thanks @ayushnag! Yes I agree with @TomAugspurger - any bugfix should really be accompanied by a regression test, and Tom's suggestion seems like an easy way to add this.

[TomNicholas]

Thanks @ayushnag !