Updating action versions

Author: glenrobson

.github/workflows/ci.yml

@@ -7,13 +7,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-python@v2
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.x' # Version range or exact version of a Python version to use, using SemVer's version range syntax
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ env.pythonLocation }}-${{ hashFiles('requirements.txt') }}