v2.1.6

Summary:
Refactors the project to improve how models are stored using a single JSON database, which are collated from provider JSON files. More models have been added to the database thanks to @robbibt! Adds some bug fixes for better backwards compatibility for FES and GOT models.

Itemized Changes:

• refactor: use JSON database for known model parameters for #328 (#329)
• feat: added new TPXO10-atlas-v2 to list of models (#329)
• feat: generalize hash function to use any available algorithm (#329)
• fix: use model name in default output filename for definition file case (#329)
• refactor: create database from providers (#329)
• refactor: drop support for the ascii definition file format (#329)
• docs: add model providers section to contributions (#329)
• ci: add GitHub Action to update database.json (#330)
• feat: Add additional models to provider JSON (#331)
• fix: add parse constituents back to model load (#331)
• fix: drop constituents from database (#331)
• ci: only run pytest action if secrets are accessible (#331)
• refactor: use idealized Azimuthal equidistant for Arctic models (#332)
• fix: deprecation in case where an array is output to scalars (#332)
• fix: j1 and theta for FES type models for #335 (#336)
• fix: nodal corrections for eps2 and eta2 when inferring for GOT5.5 (#336)
• feat: use model class attributes for file format and corrections (#336)
• feat: add option to select nodal corrections type (#336)
• feat: export database as dataclass (#337)
• docs: update getting started and README.rst (#337)
• test: add test for reading model database (#337)

Full Changelog: 2.1.5...2.1.6