Add CI tests

.github/workflows/tests.yml

@@ -0,0 +1,39 @@
+name: Tests
+on:
+  push
+
+env:
+  build_dir: ${{ github.workspace }}/build
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-20.04
+          - ubuntu-22.04
+          - windows-2019
+          - windows-2022
+          - macos-11
+          - macos-12
+          - macos-13
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Select Xcode 15.0 (for macOS 13)
+        run:  sudo xcode-select -s "/Applications/Xcode_15.0.app"
+        if:   matrix.os == 'macos-13'
+
+      - name: Configure CMake
+        run:  cmake -B ${{ env.build_dir }}
+
+      - name: Build tests
+        run:  cmake --build ${{ env.build_dir }}
+
+      - name: Run tests
+        run:  ctest --build-config
+        working-directory: ${{ env.build_dir }}

README.md

@@ -39,7 +39,7 @@ Since this is a header-only library, you can just copy the [defer.hpp](https://g
 
 ### CMake integration
 
-You can also use the CMake interface target `defer::defer` and described belowю
+You can also use the CMake interface target `defer::defer` and described below:
 
 #### Embedded