2.2.0

Release 2.2.0

- Various improvements to how certificate problems are communicated
  - Adds new warning boxes on the plugin options page when your
    certificate is invalid or nearing expiry.
  - Also adds new warning boxes on the plugin options page when
    your certificate isn't generated with the latest standards
    that Obsidian Local REST API uses.
  - Includes information about upcoming certificate expiries
    and standard compliance in `/` route output when
    incoming connection is authenticated, too, so other tools
    like Obsidian Web might be able to warn you when your
    certificate is nearing expiry.
- Moves some settings that really should be considered "Advanced"
  into "Advanced Settings" including both port settings.
- Some minor copy changes for clarity.