test: replace hard-coded 0.8.1 version assertion with semver shape check (#28)

The pinned version assertion breaks on every release bump.

Co-authored-by: jkrandom <admin@student.net>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: 3 people

tests/package-exports.test.mjs

@@ -6,8 +6,8 @@ const packageJson = JSON.parse(
   await readFile(new URL("../package.json", import.meta.url), "utf8"),
 )
 
-test("publishes the 0.8.1 release", () => {
-  assert.equal(packageJson.version, "0.8.1")
+test("publishes the current release version", () => {
+  assert.match(packageJson.version, /^\d+\.\d+\.\d+$/)
 })
 
 test("publishes explicit server and TUI plugin entrypoints", () => {