v0.20.0

(see #617)

Major changes in this version include:

• An overhaul of how errors are handled and error cases, including JSON error support (#607)
• A new API for ignoring users + updates to the Relationship struct (#606)
• Several internal changes and fixes

Public API changes

• changes to ChorusError:
  • ReceivedErrorCode is now ReceivedError, which contains a more specific error object
  • InvalidFormBody has been removed
  • InvalidResponse now contains the response's HTTP status
• due to the ratelimiter changes, Instance methods that send API requests now need an &mut self reference
• to avoid cloning Instances, auth routes (login, register and mfa) now take a cloned Shared<Instance>. The best practice way to handle Instances is now to call into_shared(), store Shared<Instance> instead of Instance and call .clone() on the Arc when creating new ChorusUsers
• new fields in the Relationship struct:
  • is_spam_request,
  • stranger_request,
  • origin_application_id and
  • user_ignored

Additions

• ChorusUser::bulk_remove_relationships
• ChorusUser::ignore_user
• ChorusUser::unignore_user
• JSON Error and Api error types

Bugfixes

• #616 - Instances are no longer cloned when logging into or registering accounts

Internal changes

• #607 (refactoring the internal ratelimiter and request logic, making it support requests without a ChorusUser)
• #608 by @zicklag (updating internal self-updating struct logic, removing an unsafe block for safer code)
• #612 and #613 by @bitfl0wer (improving CI, more checks for security)
• #614 (updating the url of discord userdoccers links in documentation)
• several dependency bumps