feat: allow custom ZwaveOptions

lib/ZwaveClient.js

@@ -1281,21 +1281,23 @@ ZwaveClient.prototype.connect = async function () {
     // this could happen when the driver fails the connect and a reconnect timeout triggers
     if (this.closed) return
 
-    let networkKey
-
-    if (this.cfg.networkKey && this.cfg.networkKey.length === 32) {
-      networkKey = Buffer.from(this.cfg.networkKey, 'hex')
+    // extend options with hidden `options`
+    const zwaveOptions = Object.assign({
+      cacheDir: storeDir,
+      networkKey: this.cfg.networkKey
+    }, this.cfg.options)
+
+    // transform network key to buffer
+    if (zwaveOptions.networkKey && zwaveOptions.networkKey.length === 32) {
+      zwaveOptions.networkKey = Buffer.from(zwaveOptions.networkKey, 'hex')
     } else {
-      networkKey = undefined
+      delete zwaveOptions.networkKey
     }
 
     try {
       // init driver here because if connect fails the driver is destroyed
       // this could throw so include in the try/catch
-      this.driver = new Driver(this.cfg.port, {
-        cacheDir: storeDir,
-        networkKey: networkKey
-      })
+      this.driver = new Driver(this.cfg.port, zwaveOptions)
 
       this.driver.on('error', driverError.bind(this))
       this.driver.once('driver ready', driverReady.bind(this))