Update to Fedora 42 and Python 3.14 as the default

Author: hroncok

README.md

@@ -37,7 +37,7 @@ a space-separated list of *provides*, such as:
 ```yaml
 - uses: fedora-python/tox-github-action
   with:
-    tox_env: py38
+    tox_env: py39
     dnf_install: pkgconfig(libffi) libgit2-devel
 ```
 
@@ -52,7 +52,7 @@ will switch to the specified path before tox execution.
 ```yaml
 - uses: fedora-python/tox-github-action
   with:
-    tox_env: py38
+    tox_env: py39
     workdir: "python/"
 ```
 
@@ -62,6 +62,14 @@ Until version 0.4, this action always used the latest [fedora-python-tox](https:
 image. Since version 34.0, the first number in the version (also sometimes
 referred to as the "major version") represents the release of Fedora used in the image.
 
+### v42.0
+
+* Uses Fedora 42 as the base container image.
+* Python 3.8 is no longer available.
+* PyPy 3.9 is no longer available
+* Freethreading Python is available (3.14t and 3.15t)
+* Python 3.14 is now the default tox environment if none is configured.
+
 ### v41.0
 
 * Uses Fedora 41 as the base container image.

action.yaml

@@ -3,7 +3,7 @@ description: Runs tests with Tox
 inputs:
   tox_env:
     required: true
-    default: 'py313'
+    default: 'py314'
     description: Tox environment to run the tests on
   dnf_install:
     required: false
@@ -16,7 +16,7 @@ inputs:
 
 runs:
   using: docker
-  image: docker://fedorapython/fedora-python-tox:f41
+  image: docker://fedorapython/fedora-python-tox:f42
   env:
     TOXENV: ${{ inputs.tox_env }}
     DNF_INSTALL: ${{ inputs.dnf_install }}

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = py27,py36,py38,py39,py310,py311,py312,py313,py314,pypy2,pypy3
+envlist = py36,py39,py310,py311,py312,py313,py314,py314t,pypy2,pypy3
 skipsdist = True
 
 [testenv]