chore: update .clang-format and install headers

Author: shenxianpeng

.github/workflows/test.yml

@@ -40,5 +40,8 @@ jobs:
           files: ./coverage.xml
           fail_ci_if_error: true # optional (default = false)
           verbose: true # optional (default = false)
+
+      - name: Install C devlopment headers
+        run: sudo apt-get update && sudo apt-get install -y build-essential
       - name: Test cpp-linter-hooks
         run: sh testing/run.sh

testing/.clang-format

@@ -1,3 +1,3 @@
 ---
-Language:        Cpp
+Language:        C
 BasedOnStyle:  WebKit