Update README.md

.github/workflows/d.yml

@@ -0,0 +1,32 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+name: D
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dlang-community/setup-dlang@4c99aa991ce7d19dd3064de0a4f2f6b2f152e2d7
+
+    - name: 'Build & Test'
+      run: |
+        # Build the project, with its main file included, without unittests
+        dub build --compiler=$DC
+        # Build and run tests, as defined by `unittest` configuration
+        # In this mode, `mainSourceFile` is excluded and `version (unittest)` are included
+        # See https://dub.pm/package-format-json.html#configurations
+        dub test --compiler=$DC

README.md

@@ -7,6 +7,8 @@ Eventy
 
 ---
 
+[![D](https://github.com/deavmi/eventy/actions/workflows/d.yml/badge.svg)](https://github.com/deavmi/eventy/actions/workflows/d.yml)
+
 ## Getting started
 
 ### The _engine_
@@ -151,4 +153,4 @@ Completely overhauled Eventy system for the v0.4.3 release
 Removed the event-loop for a better system (for now) whereby we just dispatch signal handlers on the call to `push(Event)`.
 
 In a future release I hope to bring the event loop back but in a signal-based manner, such that we can support deferred events and priorities and such
-```
+```