Set black and pyupgrade to target Python 3.7+

Author: Hugo Osvaldo Barrera

.pre-commit-config.yaml

@@ -25,7 +25,7 @@ repos:
     rev: v2.34.0
     hooks:
     -   id: pyupgrade
-        args: [--py36-plus]
+        args: [--py37-plus]
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: 'v0.961'
     hooks:

pyproject.toml

@@ -4,3 +4,6 @@ requires = ["setuptools>=45", "wheel", "setuptools_scm>=6.2"]
 [tool.setuptools_scm]
 write_to = "barcode/version.py"
 version_scheme = "post-release"
+
+[tool.black]
+target-version = ['py37']