tailscale: support split DNS endpoints (#78)

Support the GET/PATCH/PUT `/api/v2/tailnet/{tailnetID}/dns/split-dns`
endpoints for reading, updating, and replacing split DNS settings for a
given tailnet respectively.

Updates tailscale/corp#19483

Signed-off-by: Mario Minardi <[email protected]>

tailscale: support reading & writing ACL content as HuJSON (#70)

Updates tailscale/terraform-provider-tailscale#227

Signed-off-by: Anton Tolchanov <[email protected]>

Add connector fields to ACL (#64)

Bump golang.org/x/oauth2 from 0.12.0 to 0.14.0 (#62)

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.12.0 to 0.14.0.
- [Commits](golang/oauth2@v0.12.0...v0.14.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tailscale: add missing fields for the auth/api keys (#59)

Updates tailscale/terraform-provider-tailscale#144

Signed-off-by: Anton Tolchanov <[email protected]>

Fix spelling of tagOwners and autoApprovers (#46)

Use canonical spelling for tagOwners and autoApprovers tags.

tailscale: support a custom user-agent (#57)

This allows specifying a customer user-agent used for outgoing HTTP
requests.

tailscale: add recently introduced fields (#55)

* tailscale: add SetDeviceAuthorized
* tailscale: update ACL fields

Signed-off-by: Anton Tolchanov <[email protected]>

Add support for OAuth client credentials (#44)

Signed-off-by: Cameron Stokes <[email protected]>
Signed-off-by: Cameron Stokes <[email protected]>

Avoid serializing empty ACL fields (#39)

This should avoid meaningless diffs and unnecessary empty values while
managing ACL contents via Terraform.

Fixes #31