Revert release dependencies to match TensorFlow 2.5.0's dependency on 1.34.

https://github.com/tensorflow/tensorflow/blob/v2.5.0/tensorflow/tools/pip_package/setup.py#L130

Fix the nightly package to depend on gRPC 1.37 which was updated recently.

PiperOrigin-RevId: 374208257

tensorflow_federated/tools/development/setup.py

@@ -60,7 +60,7 @@ REQUIRED_PACKAGES = [
     'attrs~=19.3.0',
     'cachetools~=3.1.1',
     'dm-tree~=0.1.1',
-    'grpcio~=1.37.0',
+    'grpcio~=1.34.0',
     'jax~=0.2.8',
     'jaxlib~=0.1.55',
     'numpy~=1.19.2',
@@ -96,7 +96,7 @@ if '--nightly' in sys.argv:
   for index, required_package in enumerate(REQUIRED_PACKAGES):
     package_name = get_package_name(required_package)
     if package_name == 'grpcio':
-      REQUIRED_PACKAGES[index] = 'grpcio~=1.34.0'
+      REQUIRED_PACKAGES[index] = 'grpcio~=1.37.0'
     elif package_name == 'tensorflow':
       REQUIRED_PACKAGES[index] = 'tf-nightly'
 else: