Remove support for Python 3.5

The Windows tests started giving an SSL error. The macOS and Linux tests
had already been disabled.

.github/workflows/build.yml

@@ -25,19 +25,15 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ['3.5', '3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
         exclude:
-          # Python 3.5, and 3.6 are not supported on GitHub-hosted Ubuntu
-          # runners as of Ubuntu 22.04.
+          # Python 3.6 is not supported on GitHub-hosted Ubuntu runners as of
+          # Ubuntu 22.04.
           # https://github.com/actions/setup-python/issues/544#issuecomment-1332535877
-          - os: ubuntu-latest
-            python-version: '3.5'
           - os: ubuntu-latest
             python-version: '3.6'
           # python<=3.7 is not supported on GitHub-hosted macOS runners as of macOS 14.
           # https://github.com/actions/runner-images/issues/9770
-          - os: macos-latest
-            python-version: '3.5'
           - os: macos-latest
             python-version: '3.6'
           - os: macos-latest

README.rst

@@ -18,7 +18,7 @@ Features
 Requirements
 ------------
 
-*fenwick* supports ``python>=3.5``.
+*fenwick* supports ``python>=3.6``.
 
 Linux, Mac, and Windows are supported.