Drop support for python 3.7

WhyNotHugo · WhyNotHugo · commit ed8db72fbf7d · 2023-09-08T13:59:13.000+02:00
Two barcode implementation were actually already broken for 3.7. Rather
than fix them, drop 3.7 entirely, since its extended support is ending
next week anyway.
diff --git a/README.rst b/README.rst
@@ -26,7 +26,7 @@ python-barcode
 There are no external dependencies when generating SVG files.
 Pillow is required for generating images (e.g.: PNGs).
 
-Support Python 3.7 to 3.11.
+Support Python 3.8 to 3.11.
 
 .. image:: example-ean13.png
   :target: https://github.com/WhyNotHugo/python-barcode
diff --git a/docs/changelog.rst b/docs/changelog.rst
@@ -9,7 +9,7 @@ v0.15.1
 v0.15.0
 ~~~~~~~~~~
 
-* **Breaking** Dropped support for Python 3.6.
+* **Breaking** Dropped support for Python 3.6 and 3.7.
 * Added support for Python 3.11.
 * Fixed compatibility with Pillow 10.0.
 * Updated ISBN to support newer allocated ranges.
diff --git a/pyproject.toml b/pyproject.toml
@@ -6,7 +6,7 @@ write_to = "barcode/version.py"
 version_scheme = "post-release"
 
 [tool.black]
-target-version = ['py37']
+target-version = ['py38']
 
 [tool.ruff]
 select = [
@@ -39,7 +39,7 @@ select = [
     "PLE",
     "RUF",
 ]
-target-version = "py37"
+target-version = "py38"
 
 [tool.ruff.isort]
 force-single-line = true
diff --git a/setup.py b/setup.py
@@ -23,7 +23,6 @@
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
diff --git a/tox.ini b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = {py37,py38,py39,py310,py311}{,-images}
+envlist = {py38,py39,py310,py311}{,-images}
 skip_missing_interpreters = True
 
 [testenv]
