Install dependency tomli before script execution.

.github/workflows/CoverageCollection.yml

@@ -64,6 +64,17 @@ jobs:
       - name: ⏬ Checkout repository
         uses: actions/checkout@v2
 
+      - name: 🐍 Setup Python ${{ inputs.python_version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ inputs.python_version }}
+
+      - name: 🗂 Install dependencies
+        run: |
+          python -m pip install -U pip
+          python -m pip install tomli
+          python -m pip install ${{ inputs.requirements }}
+
       - name: 🔁 Extract configurations from pyproject.toml
         id: getVariables
         shell: python
@@ -101,16 +112,6 @@ jobs:
           print(f"::set-output name=coverage_report_xml::{xmlFile}")
           print(f"DEBUG:\n  html={htmlDirectory}\n  xml={xmlFile}")
 
-      - name: 🐍 Setup Python ${{ inputs.python_version }}
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ inputs.python_version }}
-
-      - name: 🗂 Install dependencies
-        run: |
-          python -m pip install -U pip
-          python -m pip install ${{ inputs.requirements }}
-
       - name: Collect coverage
         continue-on-error: true
         run: |