Typo in argument parsing within `preprocessing/reads_to_bigwig.py`

[KnightAsterial]

In lines 21-23 of reads_to_bigwig.py, add_argument is misspelled as add_argumen. This throws an error and prevents the file from running.

    parser.add_argumen('--bsort', required=False, default=False, action='store_true', help="use bedtools sort (default is unix sort)")
    parser.add_argumen('--no-st', required=False,  default=False, action='store_true', help="No streaming in preprocessing")
    parser.add_argumen('--tmpdir', required=False,  type=str, default=None, help="tmp dir path for unix sort command")

[panushri25]

fixed in 0.1.7