Switch from TravisCI and AppVeyor to Github Actions (#8)

No build status buttons anymore and no code coverage check anymore. On the plus side, we now also test on OS X.

Fixes #7

.github/workflows/dub-test.yml

@@ -0,0 +1,23 @@
+name: Run all D Tests
+on: [push, pull_request]
+jobs:
+  test:
+    name: Dub Tests
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        dc: [dmd-latest, ldc-latest, dmd-2.090.0, ldc-1.17.0]
+        exclude:
+          - { os: macOS-latest, dc: dmd-2.090.0 }
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install D compiler
+        uses: dlang-community/[email protected]
+        with:
+          compiler: ${{ matrix.dc }}
+
+      - name: Run tests
+        run: dub -q test

README.md

@@ -1,6 +1,3 @@
-[![Build Status Travis](https://travis-ci.org/dlang-community/d-money.svg?branch=master)](https://travis-ci.org/dlang-community/d-money)
-[![Build status Appveyor](https://ci.appveyor.com/api/projects/status/n6q6m5975c4h219m/branch/master?svg=true)](https://ci.appveyor.com/project/qznc/d-money/branch/master)
-[![codecov status](https://codecov.io/gh/dlang-community/d-money/branch/master/graph/badge.svg)](https://codecov.io/gh/dlang-community/d-money)
 [![Dub Package](https://img.shields.io/dub/v/money.svg)](https://code.dlang.org/packages/money)
 
 # D-Money