Update changelog for 2.0.0

[ehrenfeu]

Collection issue to reference from PR's that should be mentioned in the release changelog.

[ehrenfeu]

From #105

python-imcflibs/src/imcflibs/imagej/bioformats.py

Lines 355 to 356 in a6efb3f

	def get_reader(path_to_file, setFlattenedResolutions=False):
	"""Get a Bio-Formats ImageReader for the specified file.

[ehrenfeu]

From #107

python-imcflibs/src/imcflibs/imagej/bdv.py

Line 792 in 60d8756

timepoints_per_partition=0,