fix: diffsptk dependency

yoyolicoris · yoyolicoris · commit 98cbafa8093c · 2023-11-05T12:16:24.000+01:00
diff --git a/requirements.txt b/requirements.txt
@@ -9,3 +9,4 @@ docutils==0.17.1
 scikit-fem
 control
 PySoundFile
+diffsptk
