Switch CI to CI template from other Mir projects

.github/workflows/ci.yml

@@ -0,0 +1,62 @@
+name: CI
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+  workflow_dispatch:
+    # allow this workflow to be triggered manually
+
+jobs:
+  builder:
+    name: 'Build and test on ${{ matrix.arch }}-${{ matrix.os }}/${{ matrix.dc }}'
+    runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ contains(matrix.dc, 'beta') }}
+    env:
+      ARCH: ${{ matrix.arch }}
+    strategy:
+      fail-fast: false
+      matrix:
+        dc: [ldc-latest, ldc-beta, dmd-latest, dmd-beta]
+        os: [ubuntu-latest, windows-latest]
+        arch: [x86, x86_64]
+        include:
+          - dc: ldc-latest
+            os: macos-latest
+            arch: x86_64
+          - dc: dmd-latest
+            os: macos-latest
+            arch: x86_64
+    steps:
+      - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
+      - uses: dlang-community/setup-dlang@763d869b4d67e50c3ccd142108c8bca2da9df166
+        with:
+          compiler: ${{ matrix.dc }}
+      - name: Install multi-lib for 32-bit systems
+        if: matrix.arch == 'x86' && matrix.os == 'ubuntu-latest'
+        run: sudo apt-get install gcc-multilib
+      - id: build
+        name: Test building
+        run: |
+          dub test --arch=$ARCH --build=unittest-cov
+          dub build
+        shell: bash
+      - id: examples
+        name: Test building / running examples
+        run: |
+          dub run   --root examples/mir_serde
+          dub build --root examples/constructor
+          dub build --root examples/getting_started
+          dub build --root examples/representer
+          dub build --root examples/resolver
+          dub build --root examples/tojson
+          dub build --root examples/yaml_bench
+          dub build --root examples/yaml_gen
+          dub build --root examples/yaml_stats
+          dub build --root testsuite 
+        shell: bash
+      - id: coverage
+        uses: codecov/codecov-action@f32b3a3741e1053eb607407145bc9619351dc93b