add missing dev deps

Lawouach · Lawouach · commit 341aa9764e08 · 2022-12-07T14:35:31.000+01:00
Signed-off-by: Sylvain Hellegouarch &lt;sh@defuze.org&gt;
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -2,4 +2,7 @@ coverage
 pycodestyle
 pytest>=2.8
 pytest-cov
-pytest-sugar
+pytest-sugar
+black
+flake8
+isort
