update circle config

[pkfec]

Summary (required)

1. Update python docker image version to match the python version given in the runtime.txt file
2. Update Postgres docker image version to match the DB version in our govcloud environment
3. Set POSTGRES_HOST_AUTH_METHOD: "trust" environment variable. Builds fail without this env variable.

• Resolves Upgrade Python and PG in /.circleci/config.yml to be consistent with runtime version #4425

Include a summary of proposed changes.

• Update docker images in circleci/config.yml file :

1. Python from 3.7.4-buster to 3.7.8-buster
2. Postgres from 9.6 to 10.11

Screenshots

• Before upgrade:

• After upgrade:

How to test the changes locally

• Rebuild or Rerun feature/4425-update-circle-config branch on circleci and notice Spin up environment and Container circleci tasks downloading the upgraded python and postgres docker images.

[jason-upchurch]

Thank you @pkfec! I ran pytest independently and deployed this PR to dev space and tested some endpoints. All appears to be working. And thanks for adding the bit about PG. It appears to be a known issue docker/docs#10529