Fix wxPython build issue in CI by pinning psychopy version and adding system dependencies

Author: micahgallen

.github/workflows/docs.yml

@@ -26,6 +26,8 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y graphviz
+          sudo apt-get install -y build-essential
+          sudo apt-get install -y libgtk-3-dev
 
       - name: Install Python dependencies
         run: |

requirements.txt

@@ -1,7 +1,7 @@
 numpy>=1.18,<=1.23
 scipy>=1.3.0
 pandas>=1.0.3
-psychopy>=2020.1.2
+psychopy==2020.1.2
 pyserial>=3.4
 matplotlib>=3.3.3
 seaborn>=0.11.1