Merge pull request #77 from Xav83/fix/issue63

Fixes the current issues with GitHub Action

.github/workflows/boolinq-test.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         cpp_version: [11, 14, 17, 20]
         compiler: [ {cpp: g++-9, c: gcc-9}, {cpp: g++-10, c: gcc-10}, {cpp: clang++-10, c: clang-10}, {cpp: clang++-11, c: clang-11}, {cpp: clang++-12, c: clang-12} ]
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-20.04"
     steps:
       - name: Checkout
         uses: actions/checkout@v3