Use fixed os-versions in Github Actions CI pipeline (#7)

Author: borisskert

.github/workflows/cmake.yml

@@ -16,36 +16,34 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Build
+        working-directory: ./build
         run: |
-          cd build
           cmake ..
           cmake --build .
 
       - name: Run tests
-        run: |
-          cd build/test
-          ./cpp_katas_test --output=color
+        working-directory: ./build/test
+        run: ./cpp_katas_test --output=color
 
   build-macos:
-    runs-on: macos-latest
+    runs-on: macos-11
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
 
       - name: Build
+        working-directory: ./build
         run: |
-          cd build
           cmake ..
           cmake --build .
 
       - name: Run tests
-        run: |
-          cd build/test
-          ./cpp_katas_test --output=color
+        working-directory: ./build/test
+        run: ./cpp_katas_test --output=color
 
   build-windows:
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     steps:
       - name: Checkout
@@ -56,12 +54,11 @@ jobs:
           choco install ninja
 
       - name: Build
+        working-directory: ./build
         run: |
-          cd build
           cmake -G "Ninja" ..
           cmake --build .
 
       - name: Run tests
-        run: |
-          cd build/test
-          .\cpp_katas_test.exe --output=color
+        working-directory: ./build/test
+        run: .\cpp_katas_test.exe --output=color