CI: added build pipeline

Author: mgerhardy

.github/workflows/build.yml

@@ -0,0 +1,34 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+name: "Build"
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-20.04
+          - windows-2019
+          - macos-10.15
+    env:
+      ARCHIVE: 1
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v2
+
+      - name: "Compile"
+        run: make release
+
+      - name: "Upload artifacts"
+        uses: actions/upload-artifact@v2
+        with:
+          name: ${{ runner.os }}
+          path: bspc*