Drop Python 3.7 support (#160)

Author: rjgildea

.azure-pipelines/azure-pipelines.yml

@@ -15,11 +15,11 @@ stages:
     pool:
       vmImage: ubuntu-20.04
     steps:
-      # Use Python >=3.7 for syntax validation
+      # Use Python >=3.8 for syntax validation
       - task: UsePythonVersion@0
         displayName: Set up python
         inputs:
-          versionSpec: 3.7
+          versionSpec: 3.8
 
       # Run syntax validation on a shallow clone
       - bash: |
@@ -80,8 +80,6 @@ stages:
       vmImage: ubuntu-20.04
     strategy:
       matrix:
-        python37:
-          PYTHON_VERSION: 3.7
         python38:
           PYTHON_VERSION: 3.8
         python39:

setup.cfg

@@ -12,7 +12,6 @@ classifiers =
     Intended Audience :: Developers
     License :: OSI Approved :: BSD License
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
@@ -34,7 +33,7 @@ install_requires =
 packages = find:
 package_dir =
     =src
-python_requires = >=3.7
+python_requires = >=3.8
 zip_safe = False
 include_package_data = True