add defined constraints files

Author: abbrowne126

testing/constraints-3.10.txt

@@ -1,9 +1,13 @@
-# -*- coding: utf-8 -*-
-# This constraints file is required for unit tests.
+# We use the constraints file for the latest Python version
+# (currently this file) to check that the latest
+# major versions of dependencies are supported in setup.py.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+# Require the latest major version be installed for each dependency.
+# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0",
+# Then this file should have google-cloud-foo>=1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0

testing/constraints-3.11.txt

@@ -1,9 +1,13 @@
-# -*- coding: utf-8 -*-
-# This constraints file is required for unit tests.
+# We use the constraints file for the latest Python version
+# (currently this file) to check that the latest
+# major versions of dependencies are supported in setup.py.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+# Require the latest major version be installed for each dependency.
+# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0",
+# Then this file should have google-cloud-foo>=1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0

testing/constraints-3.12.txt

@@ -1,9 +1,13 @@
-# -*- coding: utf-8 -*-
-# This constraints file is required for unit tests.
+# We use the constraints file for the latest Python version
+# (currently this file) to check that the latest
+# major versions of dependencies are supported in setup.py.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+# Require the latest major version be installed for each dependency.
+# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0",
+# Then this file should have google-cloud-foo>=1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0