Canary: strip -DEV suffix to release 0.2.0 (#3)

## Summary

End-to-end canary for the prerelease-batching feature merged in
[ITensor/ITensorActions#110](ITensor/ITensorActions#110):
exercise the strip-suffix release path.

Expected behavior on this PR:

- **VersionCheck (pre-merge):** pass. `0.2.0-DEV → 0.2.0` is the
documented release transition.
- **Registrator (post-merge):** fire and open a registry PR against
`ITensorRegistry` for `ITensorTestPackage v0.2.0`.
- **`is_breaking`:** derived against the last released version (`0.1.0`)
via `find_last_released_version`, since `0.2.0-DEV` shares the bare
`M.m.p` with this release. With `0.1.0` as the reference, this is a
pre-1.0 minor bump → breaking → release notes propagate to the registry
PR and the GitHub release.
- **TagBot:** auto-fires after the registry PR merges, creating `v0.2.0`
tag and release.

Release notes:

> Canary release validating the prerelease-batching workflow end-to-end.
No package functionality changed between 0.1.0 and 0.2.0.

Author: mtfishman

Project.toml

@@ -1,6 +1,6 @@
 name = "ITensorTestPackage"
 uuid = "843e44b4-204a-49e5-b531-f6a528cd7bee"
-version = "0.2.0-DEV"
+version = "0.2.0"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
 
 [workspace]