drop support for python 3.6, as of 2 more dependencies would be needed, added banners in readme

Author: rafsaf

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
 
     services:
       postgres:

README.md

@@ -1,3 +1,11 @@
+<a href="https://github.com/rafsaf/minimal-fastapi-postgres-template/actions?query=workflow%3Atests" target="_blank">
+    <img src="https://github.com/rafsaf/minimal-fastapi-postgres-template/workflows/tests/badge.svg" alt="Test">
+</a>
+
+<a href="https://github.com/rafsaf/respo/blob/main/LICENSE" target="_blank">
+    <img src="https://img.shields.io/github/license/rafsaf/respo" alt="License">
+</a>
+
 ## Minimal async FastAPI + postgresql template
 
 ![OpenAPIexample](./docs/OpenAPI_example.png)

{{cookiecutter.project_name}}/app/core/config.py

@@ -25,7 +25,7 @@
 import toml
 from pydantic import AnyHttpUrl, AnyUrl, BaseSettings, EmailStr, validator
 
-# Literal from typing_extensions for python 3.6 and 3.7 support, remove if not needed
+# Literal from typing_extensions for python 3.7 support, remove if not needed
 try:
     from typing import Literal
 except ImportError: