v2.0.9

Summary:
Number of fixes to the code base. Fixes the units for TPXO9-atlas currents (thanks @cywhale!). Replaces the deprecated pkg_resources (thanks @mrsiegfried!).

Itemized Changes:

• fix: scaling factors for TPXO9-atlas currents for #241 (#243)
• refactor: renamed tidal ellipse function (#243)
• refactor: renamed constituent parameters function (#243)
• refactor: renamed check tide model points function (#243)
• feat: can read from netCDF4 or HDF5 variable groups (#249)
• fix: spelling mistakes (#249)
• feat: add generic wrapper function for reading ATLAS constituents (#250)
• feat: can write datetime as time column for csv files (#252)
• fix: replace deprecated pkg_resources with importlib (#256)

Full Changelog: 2.0.8...2.0.9