Python-calamine

- feat: Extract picture data by turning `picture` feature on

- fix: wrong range len calculation
- fix: date precision

- fix: Several decoding issues in xls and xlsb
- fix: Wrong decimal parsing
- refactor: bump dependencies (quick-xml in particular and chrono)
- feat: always return sheet names in lexicographic order (BTreeMap)
- chore: remove travis

- fix: Allow empty value cells in xlsx
- fix: obscure xls parsing errors (195)
- feat: Improve conversions from raw data to primitives
- docs: fix two typos in readme
- feat: replace macro matches! by match expression to reduce MSRV

- feat: use `chunks_exact` instead of chunks where possible
- fix: make `to_u32`, `read_slice` safe and sound
- fix: security issue 199
- test: add regression tests that fail with miri
- feat: detect date/time formatted cells in XLSX
- feat: brute force file detection if extension is not known
- feat: support xlsx sheet sizes beyond u32::MAX
- test: ensure doctest functions actually run
- test: run cargo fmt to fix travis tests
- fix: fix Float reading for XLSB

- docs: add `deserialize_with` example in readme
- fix: Skip phonetic run
- fix: Fix XLS float parsing error
- docs: Correct MBSC to MBCS in vba.rs (misspelled before)
- style: use 2018 edition paths
- fix: Add the ability to read formula values from XLSB
- fix: support integral date types