Silent a warning in new setuptools (#761)

``` /usr/lib/python3.9/site-packages/setuptools/dist.py:634: UserWarning: Usage of dash-separated 'max-line-length' will not be supported in future versions. Please use the underscore name 'max_line_length' instead ```
AnalogJ · Mar 18, 2021 · 59419ff · 59419ff
1 parent 42a4450
commit 59419ff
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/setup.cfg b/setup.cfg
@@ -1,4 +1,4 @@
 [flake8]
-max-line-length = 80
+max_line_length = 80
 select = C,E,F,W,B,B950
 ignore = E203,E501,W503