drop python 3.9 (#168)

Author: Liam-DeVoe

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.13t', '3.14', '3.14t', '3.15-dev', '3.15t-dev']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.13t', '3.14', '3.14t', '3.15-dev', '3.15t-dev']
         with-psutil: [false]
         include:
           - python-version: '3.14t'

pyproject.toml

@@ -9,7 +9,7 @@ name = "pytest-run-parallel"
 description = "A simple pytest plugin to run tests concurrently"
 version = "0.8.3-dev"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "pytest>=6.2.0",
 ]
@@ -30,7 +30,6 @@ classifiers = [
     "Topic :: Software Development :: Testing",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",