Add GitHub Actions

.editorconfig

@@ -7,4 +7,10 @@ indent_size = 4
 tab_width = 4
 insert_final_newline = true
 trim_trailing_whitespace = true
-charset = utf-8
+charset = utf-8
+
+[*.yml]
+end_of_line = lf
+indent_style = space
+indent_size = 2
+tab_width = 2

.github/workflows/run-tests.yml

@@ -0,0 +1,25 @@
+name: Run Tests
+on: [push, pull_request, workflow_dispatch]
+jobs:
+  test:
+    name: DUB Tests
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        dc: [dmd-latest, dmd-beta, ldc-latest, ldc-beta]
+        exclude:
+          - { os: macOS-latest, dc: dmd-latest }
+          - { os: macOS-latest, dc: dmd-beta }
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install D Compiler
+        uses: dlang-community/setup-dlang@v1
+        with:
+          compiler: ${{ matrix.dc }}
+
+      - name: Run Unittests
+        run: dub -q test

dub.json

@@ -4,6 +4,6 @@
 		"Robert Pasiński"
 	],
 	"description": "Modern command line argument parser",
-	"copyright": "Copyright © 2019, Robert Pasiński",
+	"copyright": "Copyright © 2019-2024, Robert Pasiński",
 	"license": "MIT"
 }