Update dependency numpy to v1.21.4 (#51)

renovate[bot] · renovate-bot · web-flow · commit d7592392072b · 2021-11-15T10:26:16.000+01:00
Co-authored-by: Renovate Bot &lt;bot@renovateapp.com&gt;
diff --git a/requirements.txt b/requirements.txt
@@ -1,5 +1,5 @@
 
-numpy==1.21.2
+numpy==1.21.4
 scipy==1.7.2
 coloredlogs==15.0.1
 matplotlib==3.4.3
