Update requirements.txt

On some systems setuptools (needed by dash-bootstrap-components) is not installed by default. Weirdly enough, it is not installed as dependency of Dash.

Signed-off-by: Cristian Di Pietrantonio <cristiandipietrantonio@gmail.com>

requirements.txt

@@ -11,3 +11,4 @@ tqdm
 dash-svg
 dash-bootstrap-components
 kaleido
+setuptools