build: declare our actual requirement on Python 3.8

We use torchaudio 2.1.0 which requires Python 3.8. We prefer 3.10 but don't
actually depend on it yet for this repo, so we can declare it at >=3.8.

setup.py

@@ -1,4 +1,4 @@
-""" Setup for g2p
+""" Setup for wav2vec2aligner
 """
 import datetime as dt
 from os import path
@@ -14,7 +14,7 @@
 
 setup(
     name="ctc-segmentation-aligner",
-    python_requires=">=3.6",
+    python_requires=">=3.8",
     version="1.0",
     author="Aidan Pine",
     author_email="hello@aidanpine.ca",