drop support for Python 3.8 (#162)

* drop support for Python 3.8

* add change log entry

* use Mamba and install graphviz

* remove Python 3.8 jobs

.github/workflows/ci.yml

@@ -31,9 +31,7 @@ jobs:
     with:
       envs: |
         - linux: test-oldestdeps-cov-xdist
-          python-version: 3.8
-        - linux: test-xdist
-          python-version: '3.8'
+          python-version: 3.9
         - linux: test-xdist
           python-version: '3.9'
         - linux: test-xdist

.github/workflows/ci_cron.yml

@@ -11,8 +11,6 @@ jobs:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
     with:
       envs: |
-        - macos: test-xdist
-          python-version: 3.8
         - macos: test-xdist
           python-version: 3.9
         - macos: test-xdist

.readthedocs.yaml

@@ -16,9 +16,17 @@ formats:
   - htmlzip
   - pdf
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: mambaforge-4.10
+
+conda:
+  environment: docs/rtd_environment.yaml
+
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.8
+  system_packages: false
   install:
     - method: pip
       path: .

CHANGES.rst

@@ -9,7 +9,7 @@ Bug Fixes
 Changes to API
 --------------
 
-- 
+- drop support for Python 3.8 [#162]
 
 Other
 -----

docs/rtd_environment.yaml

@@ -0,0 +1,8 @@
+name: rtd311
+channels:
+ - conda-forge
+ - defaults
+dependencies:
+ - python=3.11
+ - pip
+ - graphviz

pyproject.toml

@@ -2,7 +2,7 @@
 name = 'stcal'
 description = 'STScI tools and algorithms used in calibration pipelines'
 readme = 'README.md'
-requires-python = '>=3.8'
+requires-python = '>=3.9'
 license = { file = 'LICENSE' }
 authors = [{ name = 'STScI', email = '[email protected]' }]
 classifiers = [