add DeprecationWarning for info() (#30)

* add DeprecationWarning

* update warning

* remove space

device_smi/device.py

@@ -1,5 +1,6 @@
 import platform
 import re
+import warnings
 
 from .apple import AppleDevice
 from .base import _run
@@ -51,6 +52,14 @@ def __init__(self, device):
         else:
             raise Exception(f"The device {device_type} is not supported")
 
+    def info(self):
+        warnings.warn(
+            "info() method is deprecated and will be removed in next release.",
+            DeprecationWarning,
+            stacklevel=2
+        )
+        return self
+
     def memory_total(self):
         return self.memory_total