tailscale: update state after modification for ACL resource (#364)

Adds calls to `Read` after doing `Create` or `Update` operations for the
ACL resource. This resource was missed in #362 where it was added for
other existing resources.

Fixes tailscale/corp#19698

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

fix imports for splitdns (#363)

tailscale: add `dns_split_nameservers` resource (#359)

Add `resource_dns_split_nameservers` to allow for controlling split DNS
settings for a given tailnet.

Updates tailscale/corp#19483

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

build(deps): bump github.com/stretchr/testify from 1.8.4 to 1.9.0 (#343)

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.4...v1.9.0)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  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>

build(deps): bump actions/setup-go from 4 to 5 (#309)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 4 to 5.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tailscale_tailnet_key: only recreate reusable keys by default (#310)

This change partially reverts the behaviour introduced in #287 that
currently results in single-use keys being recreated, triggering
unnecessary updates to downstream Terraform resources.

By default, the provider will now only recreate reusable keys, ignoring
invalid single-use keys. This can also be changed now using a new
`recreate_if_invalid` attribute.

Fixes #306

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

Bump github.com/google/go-cmp from 0.5.9 to 0.6.0 (#294)

Bumps [github.com/google/go-cmp](https://github.com/google/go-cmp) from 0.5.9 to 0.6.0.
- [Release notes](https://github.com/google/go-cmp/releases)
- [Commits](google/go-cmp@v0.5.9...v0.6.0)

---
updated-dependencies:
- dependency-name: github.com/google/go-cmp
  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>
Co-authored-by: Anton Tolchanov <[email protected]>

Bump golang.org/x/tools from 0.9.1 to 0.13.0

Bumps [golang.org/x/tools](https://github.com/golang/tools) from 0.9.1 to 0.13.0.
- [Release notes](https://github.com/golang/tools/releases)
- [Commits](golang/tools@v0.9.1...v0.13.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Bump github.com/tailscale/tailscale-client-go from 1.11.0 to 1.12.0 (#…

…278)

Bumps [github.com/tailscale/tailscale-client-go](https://github.com/tailscale/tailscale-client-go) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/tailscale/tailscale-client-go/releases)
- [Commits](tailscale/tailscale-client-go@v1.11.0...v1.12.0)

---
updated-dependencies:
- dependency-name: github.com/tailscale/tailscale-client-go
  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>

README.md: update defaults and examples (#272)

- Use a default version for the `tailnet` configuration parameter and
  remove it from the example;
- Suggest a weaker version constraint that uses the latest patch
  release;
- Document using OAuth client credentials rather than personal API keys;
- Make it more clear that setting `base_url` is only necessary if you
  are using a non-default coordination server.

Fixes #207
Fixes #243