Add some general libraries

spack.yaml

@@ -7,8 +7,12 @@ spack:
     - py-notebook %gcc@10.3.0
     # General
     - py-pip %gcc@10.3.0
+    - py-numpy %gcc@10.3.0
+    - py-scipy %gcc@10.3.0
+    - py-pandas %gcc@10.3.0
+    - py-seaborn %gcc@10.3.0
+    - py-matplotlib %gcc@10.3.0
     # EBRAINS simulators
-    #- nest@2.20.0 +python +gsl +mpi %gcc@10.3.0
     - nest@3.0 +python +gsl +mpi %gcc@10.3.0
     - arbor +mpi ^python@3:3.9 %gcc@10.3.0
     - neuron +mpi %gcc@10.3.0