fix: correct SHIM_RIG_PORT_SERIAL/NETWORK constants to match hamlib enum

SHIM_RIG_PORT_SERIAL was incorrectly set to 0 (RIG_PORT_NONE) instead of 1
(RIG_PORT_SERIAL), causing rig_open() to succeed without actually opening the
serial port. All subsequent operations then failed with "port not open".

Fixed values: SERIAL=1, NETWORK=2 (matching hamlib rig_port_e enum).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: boybook

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hamlib",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "Node.js wrapper for hamlib radio control library",
   "main": "index.js",
   "module": "lib/index.mjs",

src/shim/hamlib_shim.h

@@ -71,9 +71,10 @@ typedef void* hamlib_shim_handle_t;
 /* Passband constants */
 #define SHIM_RIG_PASSBAND_NORMAL  0
 
-/* Port types */
-#define SHIM_RIG_PORT_SERIAL   0
-#define SHIM_RIG_PORT_NETWORK  4
+/* Port types (must match hamlib rig_port_e enum) */
+#define SHIM_RIG_PORT_NONE     0
+#define SHIM_RIG_PORT_SERIAL   1
+#define SHIM_RIG_PORT_NETWORK  2
 
 /* Scan types */
 #define SHIM_RIG_SCAN_STOP   0