Update min python version to 3.8

We are bumping the min python version to 3.8 given that:
- Python 3.7 has reached [EOL](https://devguide.python.org/versions/#unsupported-versions) on 2023-06-27
- Airflow has dropped support for Python 3.7 with the [2.7.0 release](https://airflow.apache.org/docs/apache-airflow/stable/release_notes.html#airflow-2-7-0-2023-08-18)

When looking at older Airflow versions, there has been support for python 3.8 since [1.10.11](https://airflow.apache.org/docs/apache-airflow/stable/release_notes.html#id204), so will keep min Airflow version as 2.0 for now.

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     strategy:
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10']
+        python: [3.8', '3.9', '3.10']
     runs-on: 'ubuntu-latest'
     steps:
     - uses: actions/checkout@master

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Removed support for Python 3.7
 
 ## [0.19.0] - 2023-07-19
 ### Added

README.md

@@ -9,7 +9,7 @@
 Welcome to *dag-factory*! *dag-factory* is a library for [Apache Airflow](https://github.com/apache/incubator-airflow) to construct DAGs declaratively via configuration files. 
 
 The minimum requirements for **dag-factory** are:
-- Python 3.6.0+
+- Python 3.8.0+
 - Apache Airflow 2.0+
 
 For a gentle introduction, please take a look at our [Quickstart Guide](#quickstart). For more examples, please see the [examples](/examples) folder.

setup.py

@@ -15,10 +15,10 @@
 NAME = "dag-factory"
 PKG_NAME = "dagfactory"
 DESCRIPTION = "Dynamically build Airflow DAGs from YAML files"
-URL = "https://github.com/ajbosco/dag-factory"
-EMAIL = "adam@boscarino.me"
+URL = "https://github.com/astronomer/dag-factory"
+EMAIL = "humans@astronomer.io"
 AUTHOR = "Adam Boscarino"
-REQUIRES_PYTHON = ">=3.7.0"
+REQUIRES_PYTHON = ">=3.8.0"
 VERSION = None
 
 here = os.path.abspath(os.path.dirname(__file__))

tox.ini

@@ -1,46 +1,15 @@
 [tox]
 envlist =
-    py37-airflow{1108,2}
     py38-airflow{1108,2}
     py39-airflow{1108,2}
     py310-airflow{1108,2}
 
 [gh-actions]
 python =
-    3.7: py37-airflow{1108,2}
     3.8: py38-airflow{1108,2}
     3.9: py39-airflow{1108,2}
     3.10: py310-airflow{1108,2}
 
-[testenv:py37-airflow1108]
-deps = 
-    pytest
-    pytest-cov
-    apache-airflow[kubernetes] >=1.10.8, <2.0.0
-    SQLAlchemy==1.3.23
-    Flask-SQLAlchemy==2.4.4
-    wtforms<=2.3.3
-    markupsafe>=1.1.1,<2.1.0
-setenv =
-    AIRFLOW__CORE__SQL_ALCHEMY_CONN = sqlite:///airflow1108.db
-commands =
-    airflow initdb
-    pytest --cov=dagfactory tests -p no:warnings --verbose --color=yes --cov-report=xml
-
-[testenv:py37-airflow2]
-deps = 
-    pytest
-    pytest-cov
-    apache-airflow[http,cncf.kubernetes] >=2.0.0
-    SQLAlchemy==1.3.23
-    Flask-SQLAlchemy==2.4.4
-    markupsafe>=1.1.1,<2.1.0
-setenv =
-    AIRFLOW__CORE__SQL_ALCHEMY_CONN = sqlite:////tmp/airflow.db
-commands =
-    airflow db init
-    pytest --cov=dagfactory tests -p no:warnings --verbose --color=yes --cov-report=xml
-
 [testenv:py38-airflow1108]
 deps = 
     pytest