chore: drop Python 3.9 support and update CI/CD workflows

- Remove Python 3.9 from test matrix in GitHub Actions workflows
- Update README to reflect new minimum Python version requirement (3.10+)
- Adjust pyproject.toml classifiers and requires-python constraint
- Ensures compatibility and reduces maintenance burden for older Python versions

Author: Vincentqyw

.github/workflows/pip.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     runs-on: ${{ matrix.platform }}
     # runs-on: self-hosted

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     runs-on: ${{ matrix.platform }}
     steps:

README.md

@@ -97,7 +97,7 @@ or deploy it locally following the instructions below.
 
 ### Requirements
 
-- [Python 3.9+](https://www.python.org/downloads/)
+- [Python 3.10+](https://www.python.org/downloads/)
 
 #### Install from pip [NEW]
 

pyproject.toml

@@ -10,13 +10,12 @@ authors = [
     {name = "vincentqyw"},
 ]
 readme = "README.md"
-requires-python = ">=3.9,<3.13"
+requires-python = ">=3.10,<3.13"
 license = {file = "LICENSE"}
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",