release: bump to next version (#255)

This patch bumps the version to the next one and updates the release
checklist with learnings from the last release.

.github/ISSUE_TEMPLATE/release_checklist.md

@@ -12,8 +12,11 @@ labels: release
  and paste the link to the relevant PR.
 -->
 - [ ] Make sure the [VERSION](https://github.com/oxidecomputer/oxide.go/blob/main/VERSION) and [oxide/version.go](https://github.com/oxidecomputer/oxide.go/blob/main/oxide/version.go) files have the new version you want to release.
+- [ ] Make sure the changelog file in the `.changelog/` directory is set to the new version you want to release (e.g., replace `+dev` metadata).
 - [ ] Make sure all examples and docs reference the new version.
 - [ ] Generate changelog by running `make changelog` and add date of the release to the title.
 - [ ] Release the new version by running `make tag`.
-- [ ] Bump the version in [VERSION](https://github.com/oxidecomputer/oxide.go/blob/main/VERSION) and [oxide/version.go](https://github.com/oxidecomputer/oxide.go/blob/main/oxide/version.go)
-- [ ] Create a new file for the next release in [.changelog/](https://github.com/oxidecomputer/oxide.go/blob/main/.changelog/)
+- [ ] Update GitHub release description with release notes generated from `make changelog`.
+- [ ] Create a release branch from the commit of the release tag.
+- [ ] Bump the version in [VERSION](https://github.com/oxidecomputer/oxide.go/blob/main/VERSION) and [oxide/version.go](https://github.com/oxidecomputer/oxide.go/blob/main/oxide/version.go). If the `version` within [`nexus.json`](https://github.com/oxidecomputer/omicron/blob/main/openapi/nexus.json) hasn't been updated to the next release, then use `+dev` for the version metadata.
+- [ ] Create a new file for the next release in [.changelog/](https://github.com/oxidecomputer/oxide.go/blob/main/.changelog/). If the `version` within [`nexus.json`](https://github.com/oxidecomputer/omicron/blob/main/openapi/nexus.json) hasn't been updated to the next release, then use `+dev` for the version metadata.

VERSION

@@ -1 +1 @@
-v0.1.0+20241204.0.0
+v0.2.0+dev

oxide/version.go

@@ -4,4 +4,4 @@ package oxide
 // dynamically populate the user agent for the Client. It is purposefully
 // unexported to prevent external users from reading it. This must be changed
 // along with the VERSION file in the root of this repository.
-const version = "v0.1.0+20241204.0.0"
+const version = "v0.2.0+dev"