Add new methods to dump_devinfo and mask aliases (#574)

kasa/tests/fixtures/HS100(UK)_4.1_1.1.0.json

@@ -17,7 +17,7 @@
     "system": {
         "get_sysinfo": {
             "active_mode": "none",
-            "alias": "Bedroom Lamp 2",
+            "alias": "#MASKED_NAME#",
             "dev_name": "Smart Wi-Fi Plug",
             "deviceId": "0000000000000000000000000000000000000000",
             "err_code": 0,

kasa/tests/fixtures/smart/P110(UK)_1.0_1.3.0.json

@@ -128,7 +128,7 @@
         "longitude": 0,
         "mac": "00-00-00-00-00-00",
         "model": "P110",
-        "nickname": "VGFwaSBTbWFydCBQbHVnIDE=",
+        "nickname": "I01BU0tFRF9OQU1FIw==",
         "oem_id": "00000000000000000000000000000000",
         "on_time": 119335,
         "overcurrent_status": "normal",
@@ -138,7 +138,7 @@
         "rssi": -57,
         "signal_level": 2,
         "specs": "",
-        "ssid": "IyNNQVNLRUROQU1FIyM=",
+        "ssid": "I01BU0tFRF9TU0lEIw==",
         "time_diff": 0,
         "type": "SMART.TAPOPLUG"
     },