Update GRPCIO version for Python 3.8 and higher. (#1294)

* revert updated lib versions

* updating fix for python3.7

* updating fix for python3.7

* reverting fix for python3.7

* update

setup.py

@@ -107,12 +107,18 @@ PACKAGES = [
 
 INSTALL_REQUIRES = [
     "azure-functions==1.15.1b2",
-    "python-dateutil~=2.8.2",
-    "protobuf~=4.22.0",
-    "grpcio-tools~=1.54.2",
-    "grpcio~=1.54.2"
+    "python-dateutil~=2.8.2"
 ]
 
+if sys.version_info[:2] == (3, 7):
+    INSTALL_REQUIRES.extend(
+        ("protobuf~=3.19.3", "grpcio-tools~=1.43.0", "grpcio~=1.43.0")
+    )
+else:
+    INSTALL_REQUIRES.extend(
+        ("protobuf~=4.22.0", "grpcio-tools~=1.54.2", "grpcio~=1.54.2")
+    )
+
 EXTRA_REQUIRES = {
     "dev": [
         "azure-eventhub~=5.7.0",  # Used for EventHub E2E tests