Switch to importlib.metadata from the deprecated pkg_resources mo…

…dule (#207)

zigpy_znp/api.py

@@ -8,11 +8,11 @@
 import itertools
 import contextlib
 import dataclasses
+import importlib.metadata
 from collections import Counter, defaultdict
 
 import zigpy.state
 import async_timeout
-import pkg_resources
 import zigpy.zdo.types as zdo_t
 import zigpy.exceptions
 from zigpy.exceptions import NetworkNotFormed
@@ -136,10 +136,9 @@ async def _load_network_info(self, *, load_devices=False):
         )
 
         version = await self.request(c.SYS.Version.Req())
-        package_version = pkg_resources.get_distribution("zigpy_znp").version
 
         network_info = zigpy.state.NetworkInfo(
-            source=f"zigpy-znp@{package_version}",
+            source=f"zigpy-znp@{importlib.metadata.version('zigpy-znp')}",
             extended_pan_id=nib.extendedPANID,
             pan_id=nib.nwkPanId,
             nwk_update_id=nib.nwkUpdateId,

zigpy_znp/tools/network_backup.py

@@ -5,9 +5,9 @@
 import asyncio
 import logging
 import datetime
+import importlib.metadata
 
 import zigpy.state
-import pkg_resources
 
 import zigpy_znp.types as t
 from zigpy_znp.api import ZNP
@@ -84,8 +84,7 @@ async def backup_network(znp: ZNP) -> t.JSONType:
 
     now = datetime.datetime.now().astimezone()
 
-    package_version = pkg_resources.get_distribution("zigpy_znp").version
-    obj["metadata"]["source"] = f"zigpy-znp@{package_version}"
+    obj["metadata"]["source"] = f"zigpy-znp@{importlib.metadata.version('zigpy-znp')}"
     obj["metadata"]["internal"] = {
         "creation_time": now.isoformat(timespec="seconds"),
         "zstack": {