Replace Travis-ci file with Github Workflow

.github/workflows/d.yml

@@ -0,0 +1,25 @@
+# Note that libblas is already installed on both Ubuntu and OSX
+name: Test
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, macOS-latest ]
+        dc: [ dmd-latest, ldc-latest ]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Install compiler
+        uses: dlang-community/setup-dlang@v1
+        with:
+          compiler: ${{ matrix.dc }}
+      - name: Test
+        run: |
+          for ex in $(ls -d examples/*/);
+          do
+              dub test --root=$ex
+          done

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/DlangScience/cblas.svg?branch=master)](https://travis-ci.org/DlangScience/cblas)
+[![CI](https://github.com/DlangScience/cblas/actions/workflows/d.yml/badge.svg)](https://github.com/DlangScience/cblas/actions/workflows/d.yml)
 
 D BLAS header
 =======