Lakeview

- **Feature**: added `lakeview.Wiggle` for visualising continuous one-dimensional data in the [BigWig format](https://genome.ucsc.edu/goldenpath/help/bigWig.html).
- Various minor improvements and bug fixes.

- Bug fix: fixed a bug that caused the `load_pileup` option of `SequenceAlignment.draw_alignment` to have no effect.
- Bug fix: fixed a bug that caused visual differences when aligned segments have multiple colors.

- Improvement: added `load_pileup` option to `SequenceAlignment`.
- Improvement: loading GTF files now triggers a `DeprecationWarning`.
- Bug fix: read pairs are now inferred from names rather than coordinates.

- Bug fix: fixed a bug that caused incorrect title locations in `GenomeViewer`.

- Improvement: smarter locations and formatting for `GenomeViewer` ticks and tick labels.
- Improvement: `lakevew. region_notation.get_region_notation` can now accept `float` intervals.
- Improvement: `lakeview.annotation.GeneAnnotation.from_file` now accepts two new arguments: `transcript_key` and `parent_transcript_key`. This improves compatibility with custom GFF3/GTF files.
- Bug fix: segments without base modification information will no longer cause an error when drawing modified bases.
- Bug fix: fixed a bug that causes an error when pressing the "Go" button in the `GenomeViewer` widget.
- Various documentation updates.

Initial production release