chore: bump version to 1.2.0

New features: file attachments (PR #2), mail merge (PR #3)
Bug fix: locale-independent date parsing (PR #4)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "apple-mail-mcp",
-  "version": "1.1.1",
+  "version": "1.2.0",
   "description": "MCP server for Apple Mail - read, search, send, and manage emails via Claude",
   "type": "module",
   "main": "build/index.js",