Seabirdscientific

New Features:

- Add Community contribution guidelines

Fixes:

- Uses specific version of plotly
- Removed python 3.10 pipe ( | ) operators to work under python 3.9
- Fixed broken links in version 2.5.1

Features:
* Add NMEA support to SBE19plusV2 hex parser

Fixes:
* Conforms to mypy type checking
* Adds unit test to bin average

Fixes:
* Revises cal_coefficient docs according to internal feedback
* Deprecates and replaces pH coefficients prefixed with int_ and ext_
* Updates example_data/example_coefficients.py to match the one in tests
* Uses dataclass to create most cal_coefficient classes

Features:
* Adds SeaFET internal temperature conversion
* Adds SeaFET relative humidity conversion
* Adds pylint dependency

Fixes:
* Fixes various pylint warnings

Fixes:
* Doc strings are now all formatted for sphinx