try to test pyNN.neuron on Windows

Author: apdavison

.github/workflows/full-test.yml

@@ -33,7 +33,6 @@ jobs:
       run: |
         python -m pip install brian2
     - name: Install NEURON
-      if: startsWith(matrix.os, 'ubuntu')
       run: |
         python -m pip install neuron
     - name: Install PyNN itself