Create GitHub CI (#19)

* Create ci.yml

* Add matrix build for all os

* Try to install lein

* Update ci.yml

* Update ci.yml

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: Clojure CI
+
+on:
+  workflow_dispatch:
+  push:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+        java-version: [ 21 ]
+        distribution: [ temurin ]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-java@v4
+      with:
+        java-version: ${{ matrix.java-version }}
+        distribution: ${{ matrix.distribution }}
+
+    - name: Install Leiningen on Windows
+      if: runner.os == 'Windows'
+      run: |
+        choco install lein
+        
+    - name: Install Leiningen on Mac
+      if: runner.os == 'macOS'
+      run: |
+        brew update
+        brew install leiningen
+
+    - name: Install dependencies
+      run: lein deps
+
+    - name: Run tests
+      run: lein test