Clang Fixes (#249)

* clang fixes

* Changed version of clang in MacOS

* Revert change

* Update tests_suite.yml

* Switched to clang 11

.github/workflows/tests_suite.yml

@@ -30,7 +30,7 @@ jobs:
           - os: ubuntu-20.04
             DEPENDENCIES_INSTALLATION: "sudo apt -y install clang-format-10 cppcheck"
           - os: macos-10.15
-            DEPENDENCIES_INSTALLATION: "brew install clang-format cppcheck"
+            DEPENDENCIES_INSTALLATION: "brew install clang-format@11 cppcheck; ln /usr/local/bin/clang-format-11 /usr/local/bin/clang-format"
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2