fix(deps): update setup.py to install httplib2>=0.15.0 (#1050)

* fix: Pin the httplib2 version to a compatible version (0.15.0)
diff --git a/setup.py b/setup.py
index 90285c5..653742a 100644
--- a/setup.py
+++ b/setup.py
@@ -35,10 +35,7 @@
 packages = ["apiclient", "googleapiclient", "googleapiclient/discovery_cache"]
 
 install_requires = [
-    # NOTE: Apache Beam tests depend on this library and cannot
-    # currently upgrade their httplib2 version.
-    # Please see https://github.com/googleapis/google-api-python-client/pull/841
-    "httplib2>=0.9.2,<1dev",
+    "httplib2>=0.15.0,<1dev",
     "google-auth>=1.16.0",
     "google-auth-httplib2>=0.0.3",
     "google-api-core>=1.21.0,<2dev",