Modernize Python versions

Author: sampsyo

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: ["3.6", "3.7", "3.8", "3.9"]
+        python: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v2

README.rst

@@ -58,7 +58,7 @@ A second optional parameter to ``audio_open`` specifies which backends to try
 ``available_backends`` function to get a list backends that are usable on the
 current system.
 
-Audioread supports Python 3 (3.6+).
+Audioread supports Python 3 (3.8+).
 
 Example
 -------

pyproject.toml

@@ -15,11 +15,10 @@ classifiers = [
     'Topic :: Multimedia :: Sound/Audio :: Conversion',
     'Intended Audience :: Developers',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.6',
-    'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
+    'Programming Language :: Python :: 3.11',
 ]
 
 [project.optional-dependencies]