Parallelize matrix runs

.github/workflows/main.yml

@@ -5,7 +5,7 @@ on: [push, pull_request, workflow_dispatch]
 jobs:
   build:
     strategy:
-      max-parallel: 4
+      max-parallel: 6
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
@@ -21,7 +21,6 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools
         pip install .
     - name: Create Examples
       run: PYTHONPATH=$(pwd)/src/wireviz:$PYTHONPATH cd src/wireviz/ && python build_examples.py