feat: Resolve latest LSP version from Maven Central (#127)

Change the default smithy.server.version from a pinned version to
latest.release, which Coursier resolves to the newest published
version on Maven Central. This eliminates the need for an extension
release each time the language server is updated.

Users can still pin a specific version via the smithy.server.version
setting.

Author: yasmewad

package.json

@@ -155,7 +155,7 @@
                 },
                 "smithy.server.version": {
                     "type": "string",
-                    "default": "0.8.0",
+                    "default": "latest.release",
                     "description": "Version of smithy-language-server to use. Ignored if smithy.server.executable is provided."
                 },
                 "smithy.server.diagnostics.minimumSeverity": {