Seqchromloader

Fix the bug that the duplicate key shared by the last batch and the batch before the last

**Full Changelog**: https://github.com/seqcode/seqchromloader/compare/0.5.2...0.5.3

Add get_genome_size and random_coords functions, also the corresponding test functions


**Full Changelog**: https://github.com/seqcode/seqchromloader/compare/0.5.1...0.5.2

add braceexpand option to `dump_data_webdataset` to simplify wds file list

Add several utility functions to help easily prepare the training dataset:

- filter_chromosomes
- make_random_shift
- make_flank
- chop_genome
- dna2OneHot
- rev_comp

- add a new function `convert_data_webdataset` to transform an existing webdataset file
- add `DALI` option to `dump_data_webdataset` to create NVIDIA DALI compatible webdataset for loading

**Full Changelog**: https://github.com/seqcode/seqchromloader/compare/0.3.0...0.4.0