Update dependency installation in workflows to include tomlkit

Author: Antoine

.github/workflows/OnPush.yml

@@ -25,7 +25,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytest build coverage
+        pip install pytest build Coverage
+        pip install tomlkit==0.13.2
 
     - name: Install make
       run: sudo apt-get install make

.github/workflows/OnRelease.yml

@@ -25,6 +25,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pytest coverage
+        pip install tomlkit==0.13.2
 
     - name: Install make
       run: sudo apt-get install make