build: update requirements.txt to avoid pinning

lrq3000 · lrq3000 · commit f29c5ce7dd4d · 2023-07-17T01:36:04.000+02:00
Signed-off-by: Stephen L. &lt;LRQ3000@gmail.com&gt;
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,5 @@
-matplotlib==3.3.4
-numpy==1.21.0
-pandas==1.3.4
-scipy==1.6.1
+# Always keep this file even if empty, it’s necessary to avoid GitHub Actions setup-python choking...
+matplotlib>=3.3.4
+numpy>=1.21.0
+pandas>=1.3.4
+scipy>=1.6.1
