Update test requirements for Python 3.x CI jobs (#314)

* Update Requirements for Python 3.x

* Downgrade flask due to Werkzeug issues in moto library

* starlette needs aiofiles as a requirement

This change is done because we were getting pip resolver issues due to a conflict arose from the latest release of projects from Pallets: https://palletsprojects.com/blog/flask-2-0-released/

Author: manojpandey

tests/requirements.txt

@@ -1,34 +1,31 @@
-aiofiles>=0.5.0;python_version>="3.5"
-aiohttp>=3.5.4;python_version>="3.5"
-asynqp>=0.4;python_version>="3.5"
-boto3>=1.10.0
-celery>=4.1.1
-django>=2.2.13;python_version>="3.5"
-fastapi>=0.61.1;python_version>="3.6"
-flask>=0.12.2
-grpcio>=1.18.0
+aiofiles>=0.5.0
+aiohttp>=3.7.4
+asynqp>=0.6
+boto3>=1.17.74
+celery>=5.0.5
+coverage>=5.5
+Django>=3.2.3
+fastapi>=0.65.1
+flask>=1.1.4,<2.0.0
+grpcio>=1.37.1
 google-cloud-pubsub<=2.1.0
-google-cloud-storage>=1.24.0;python_version>="3.5"
-lxml>=3.4
-mock>=2.0.0
+google-cloud-storage>=1.24.0
+lxml>=4.6.3
+mock>=4.0.3
 moto>=1.3.16,<2.0
-mysqlclient>=1.3.14;python_version>="3.5"
-MySQL-python>=1.2.5;python_version<="2.7"
-nose>=1.0
-PyMySQL[rsa]>=0.9.1
-pyOpenSSL>=16.1.0;python_version<="2.7"
-psycopg2>=2.7.1
-pika>=1.0.0
-pymongo>=3.7.0
-pyramid>=1.2
-pytest>=4.6
+mysqlclient>=2.0.3
+nose>=1.3.7
+PyMySQL[rsa]>=1.0.2
+psycopg2-binary>=2.8.6
+pika>=1.2.0
+pymongo>=3.11.4
+pyramid>=2.0
+pytest>=6.2.4
 pytest-celery
-redis>3.0.0
-requests>=2.17.1
-sqlalchemy>=1.1.15
-spyne>=2.9,<=2.12.14
+redis>=3.5.3
+sqlalchemy>=1.4.15
+spyne>=2.13.16
 suds-jurko>=0.6
 tornado>=4.5.3,<6.0
-uvicorn>=0.12.2;python_version>="3.6"
+uvicorn>=0.13.4
 urllib3[secure]!=1.25.0,!=1.25.1,<1.26,>=1.21.1
-coverage