chore: bump to 0.8.4

Sync the README's stderr example to v0.8.3's actual output (was showing
the v0.8.2 banner with a stale 21-tool count from before annotations
shifted). Also bumps package-lock.json — previous releases never updated
it past 0.8.0, leaving it out of sync with package.json.

No code changes.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: jeffyaw

README.md

@@ -158,7 +158,7 @@ Set to `1` or `true` to drop every tool without `readOnlyHint: true`. Stacks wit
 The server logs the active filter to stderr on startup:
 
 ```
-@yawlabs/tailscale-mcp v0.8.2 ready (21 tools, profile=core, readonly)
+@yawlabs/tailscale-mcp v0.8.3 ready (19 tools, profile=core, readonly)
 ```
 
 If you don't set any filter, startup prints a tip pointing you at the profiles.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@yawlabs/tailscale-mcp",
-  "version": "0.8.3",
+  "version": "0.8.4",
   "description": "Tailscale MCP server for managing your tailnet from AI assistants",
   "license": "MIT",
   "author": "YawLabs <contact@yaw.sh>",