changed requirements.txt:

- mypy makes problems with stubs of numpy==1.21.*, so thate 1.20.* is used
- update to the latest construct version

Author: timrid

requirements.txt

@@ -1,6 +1,6 @@
-construct==2.10.66
+construct==2.10.67
 pytest>=6.2.0
-numpy>=1.20.*
+numpy==1.20.*
 arrow
 ruamel.yaml
 cloudpickle