Python-calamine

- refactor (breaking): rename `DataType` enum to `Data` and `DataTypeRef` to `DataRef`
- feat: introduce a `DataType` trait implemented by both `Data` and `DataRef`.
- feat: `Data` and `DataType` now return `Some(0{.0})` and `Some(1{.0})` rather than `None` when `.as_i64` or `.as_f64`
is used on a Bool value
- fix: getting tables names on xlsx workbook without _rels files
- refactor: DateTime(f64) to DateTime(ExcelDateTime)
- feat: detect xlsb/ods password protected files
- feat: introduce is_x methods for date and time variants

- fix: `worksheet_formula` not returning all formula

- feat: add new `DataTypeRef` available from `worksheet_range_ref` to reduce memory usage
- docs: add benchmark plot
- fix: truncated text in xls
- feat: detect if workbook is password protected

- fix: regression on `Range::get`
- chore: update GitHub actions
- fix: spelling of formula error type
- feat: support label cells for xls
- refactor: clippy
- perf: preallocate several buffers

- docs: improve `de_opt_f64` example.
- docs: remove datetime notice from README
- feat: add support of sheet type and visibility
- style: clippy
- chore: bump MSRV to 1.63 (breaking)
- chore: set edition to 2021
- feat: implement blank string handling

- fix: formula with string not displaying properly