New CI.

.github/workflows/macos-ci.yml

@@ -0,0 +1,16 @@
+name: Macos-CI
+
+on: [push, pull_request]
+
+jobs:
+  macos-build:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use cmake
+        run: |
+          mkdir build
+          cd build
+          cmake  ..
+          cmake --build . 
+          ctest . --output-on-failure

.github/workflows/ubuntu-ci.yml

@@ -1,6 +1,7 @@
 name: Ubuntu-CI
 
-on: push
+on: [push, pull_request]
+
 
 
 jobs:

.github/workflows/vs-ci.yml

@@ -0,0 +1,26 @@
+name: VS-CI
+
+on: [push, pull_request]
+
+jobs:
+  ci:
+    name: windows-vs
+    runs-on: windows-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: Configure
+      run: |
+        cmake -B build
+    - name: Build Debug
+      run: cmake --build build --config Debug --verbose
+    - name: Build Release
+      run: cmake --build build --config Release --verbose
+    - name: Run Release tests
+      run: |
+        cd build
+        ctest -C Release  -LE explicitonly  --output-on-failure
+    - name: Run Debug tests
+      run: |
+        cd build
+        ctest -C Debug  -LE explicitonly  --output-on-failure

CMakeLists.txt

@@ -3,7 +3,7 @@
 #
 # Copyright (c) 2012 Louis Dionne
 #
-cmake_minimum_required(VERSION 2.8.7)
+cmake_minimum_required(VERSION 3.0)
 set (CMAKE_CXX_STANDARD 11) # for constexpr specifier and other goodies
 
 if (NOT CMAKE_BUILD_TYPE)