Pysradb

- BREAKING change: Overhaul of how urls and associated metadata are
returned (not backward compatible); all column names are lower cased
by default
- Fix extra space in \"organism_taxid\" column
- Added support for Experiment attributes [89](https://github.com/saketkc/pysradb/issues/89#issuecomment-1439319532)

- Fix ENA fastq fetching [163](https://github.com/saketkc/pysradb/issues/163)

- Fix for fetching alternative URLs

- Added ability to fetch alternative URLs (GCP/AWS) for metadata
[161](https://github.com/saketkc/pysradb/issues/161)
- Fix for xmldict 0.13.0 no longer defaulting to OrderedDict [159](https://github.com/saketkc/pysradb/pull/159)
- Fix for missing experiment model and description in metadata [160](https://github.com/saketkc/pysradb/issues/160)

- Add [study_title] to [\--detailed] flag
([152](https://github.com/saketkc/pysradb/issues/152))
- Fix [KeyError] in [metadata] where some new
IDs do not have any metadata
([151](https://github.com/saketkc/pysradb/issues/151))

- Do not exit if a qeury returns no hits ([149](https://github.com/saketkc/pysradb/pull/149))