Update minimum version to Python 3.10 (#620)

Author: cthoyt

.github/workflows/deploy-docs.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Python 3.
       uses: actions/setup-python@v3
       with:
-        python-version: 3.9
+        python-version: "3.10"
 
     - name: Install Poetry
       uses: snok/install-poetry@v1

.github/workflows/pypi-publish.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python
         uses: actions/[email protected]
         with:
-          python-version: 3.9
+          python-version: "3.10"
 
       - name: Install Poetry
         run: pip install poetry==2.1.3

.github/workflows/qc.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: [ "3.9", "3.10", "3.11", "3.12" ]
+        python-version: [ "3.10", "3.11", "3.12" ]
 
     steps:
       - uses: actions/[email protected]

poetry.lock

@@ -10,7 +10,7 @@ authors = [
 license = "MIT"
 license-files = ["LICENSE"]
 readme = "README.md"
-requires-python = ">=3.9,<4.0.0"
+requires-python = ">=3.10,<4.0.0"
 
 dependencies = [
     "click>=8.1.6",
@@ -59,7 +59,7 @@ style = "pep440"
 
 [tool.black]
 line-length = 100
-target-version = ["py38", "py39", "py310"]
+target-version = ["py310", "py311", "py312", "py313"]
 
 [[tool.mypy.overrides]]
  module = [