Migrate from AppVeyor to GitHub actions. (#39)

* Fix the Qt build.

* Add a GitHub workflow.

* Update build steps.

* Set up VS paths.

* Get rid of call.

* Don't specify generator.

* Fix source directory.

* Refactor build.

* Update build parallelism.

* Add a build matrix.

* Fix matrix variable name.

* Fix matrix variable prefix.

* Play around with line wrapping.

* Play around with line wrapping.

* Finally understand line wrapping?

* Rename Windows build.

* Rename workflow file.

* Fix VS2015 build.

* Add VS2017 build.

* Delete appveyor.yml.

.github/workflows/vs2017.yml

@@ -0,0 +1,40 @@
+name: VS2017
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: 1
+
+jobs:
+  build:
+
+    runs-on: windows-2016
+
+    strategy:
+      matrix:
+        config: [Debug, Release]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure
+      run: |
+        cmake -Bbuild -DCMAKE_BUILD_TYPE=${{matrix.config}} .
+
+    - name: Build tests
+      run: >
+        cmake --build build --config ${{matrix.config}}
+        --target unit_test_runner -j4
+
+        cmake --build build --config ${{matrix.config}}
+        --target single_header_tester
+
+    - name: Test
+      run: |
+        cmake --build build --config ${{matrix.config}} --target ctest

.github/workflows/vs2019.yml

@@ -0,0 +1,40 @@
+name: VS2019
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+env:
+  CTEST_OUTPUT_ON_FAILURE: 1
+
+jobs:
+  build:
+
+    runs-on: windows-2019
+
+    strategy:
+      matrix:
+        config: [Debug, Release]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure
+      run: |
+        cmake -Bbuild -DCMAKE_BUILD_TYPE=${{matrix.config}} .
+
+    - name: Build tests
+      run: >
+        cmake --build build --config ${{matrix.config}}
+        --target unit_test_runner -j4
+
+        cmake --build build --config ${{matrix.config}}
+        --target single_header_tester
+
+    - name: Test
+      run: |
+        cmake --build build --config ${{matrix.config}} --target ctest

unit_tests/flow/try_catch.cpp

@@ -8,7 +8,7 @@
 
 struct my_exception
 {
-    int x = 0;
+    int x;
 };
 
 TEST_CASE("try_catch", "[flow][try_catch]")