Drop Python 3.7 support

GitHub Actions is failing on 3.7 every second scheduled run for a
mysterious missing 2-lines of code coverage reasons that I'm in no mood
to investigate.

Python 3.7 is EOL, maybe I can just ignore these and hope they don't
show up on other Python versions?

.github/workflows/build.yml

@@ -20,7 +20,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"

CHANGELOG.rst

@@ -5,7 +5,7 @@ Dozer Changelog
 ----------------
 
 - Add support for Python 3.10, 3.10, and 3.12.
-- Drop support for Python 2.7 and 3.6.
+- Drop support for Python 2.7, 3.6 and 3.7.
 
 
 0.8 (November 13, 2020)

appveyor.yml

@@ -8,7 +8,6 @@ environment:
   matrix:
     # https://www.appveyor.com/docs/installed-software#python lists available
     # versions
-    - PYTHON: "C:\\Python37-x64"
     - PYTHON: "C:\\Python38-x64"
     - PYTHON: "C:\\Python39-x64"
     - PYTHON: "C:\\Python310-x64"

setup.py

@@ -38,7 +38,6 @@ def read(filename):
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",
         "License :: Public Domain",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py37, py38, py39, py310, py311, py312
+envlist = py38, py39, py310, py311, py312
 minversion = 2.4
 
 [testenv]