js(deps) bump libtmux floor 0.55.0 -> 0.55.1 (#24)

why: libtmux 0.55.1 ships the pytest-plugin socket-reaper fix
(tmux-python/libtmux#661). The `server` and `TestServer` fixtures now
kill the tmux daemon *and* unlink the socket file under
`/tmp/tmux-<uid>/` on teardown, eliminating the `libtmux_test*`
accumulation that downstream consumers like this package inherited.
Bumping the floor makes the fix part of the install contract; the
lockfile refresh guarantees CI and fresh installs pick it up.

what:
- **`pyproject.toml`** — dependency specifier `libtmux>=0.55.0,<1.0`
  -> `libtmux>=0.55.1,<1.0`.
- **`uv.lock`** — regenerated; resolved `libtmux==0.55.0` ->
  `libtmux==0.55.1`.
- **`CHANGES`** — unreleased Dependencies section notes the floor
  bump and points at the upstream fix.

Downstream effect: obsoletes #23 (local conftest socket reaper),
which was a workaround for the same leak. Close #23 without merge.

Release notes: https://libtmux.git-pull.com/history.html (libtmux
0.55.1 section).

Author: tony

CHANGES

@@ -6,6 +6,16 @@
 _Notes on upcoming releases will be added here_
 <!-- END PLACEHOLDER - ADD NEW CHANGELOG ENTRIES BELOW THIS LINE -->
 
+### Dependencies
+
+- Minimum `libtmux>=0.55.1` (was `>=0.55.0`). 0.55.1 ships the
+  pytest-plugin socket-reaper fix
+  ([tmux-python/libtmux#661](https://github.com/tmux-python/libtmux/pull/661))
+  so `libtmux_test*` daemons and socket files no longer leak under
+  `/tmp/tmux-<uid>/` during test runs. Downstream effect: no local
+  conftest reaper is needed in libtmux-mcp — the upstream fixtures
+  self-clean.
+
 ## libtmux-mcp 0.1.0a2 (2026-04-19)
 
 _FastMCP alignment: new tools, prompts, and middleware (#15)_

pyproject.toml

@@ -40,7 +40,7 @@ include = [
 ]
 
 dependencies = [
-  "libtmux>=0.55.0,<1.0",
+  "libtmux>=0.55.1,<1.0",
   "fastmcp>=3.2.4,<4.0.0",
 ]