Install the python requirements for the linux based CI.

Author: robertoraggi

.github/workflows/ci.yml

@@ -15,6 +15,10 @@ jobs:
         with:
           submodules: true
 
+      - name: Install unit tests requirements
+        run: |
+          pip install -r tests/unit_tests/requirements.txt
+
       - name: Build
         run: |
           mkdir -p build

tests/unit_tests/requirements.txt

@@ -0,0 +1,2 @@
+lit==13.0.0
+filecheck==0.0.19