remove python 3.8 from testing matrix due to NIR incompatibility

Author: jeshraghian

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11']
 
     steps:
     - uses: actions/checkout@v2

CONTRIBUTING.rst

@@ -102,7 +102,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 3.8, 3.9, 3.10, 3.11 and for PyPy. Check
+3. The pull request should work for Python 3.9, 3.10, 3.11 and for PyPy. Check
    https://github.com/jeshraghian/snntorch/actions
    and make sure that the tests pass for all supported Python versions.
 

tox.ini

@@ -6,7 +6,6 @@ python =
     3.11: py311
     3.10: py310
     3.9: py39
-    3.8: py38
 
 [testenv:flake8]
 basepython = python