Test install latest psyneulink

Author: pgleeson

.github/workflows/ci_test_all.yml

@@ -40,7 +40,7 @@ jobs:
         python -m pip install -U pip
 
         # pip install psyneulink from https://github.com/PrincetonUniversity/PsyNeuLink, branch devel
-        pip install git+https://github.com/PrincetonUniversity/PsyNeuLink.git@devel
+        pip install psyneulink
 
         export NEURON_HOME=$pythonLocation
         ./test_all.sh