Set up GitHub action for deploying to Maven Central on new tag.

.github/workflows/build.yml

@@ -1,20 +1,18 @@
-name: build
-
+name: Build
 on:
   push:
     branches:
       - master
   pull_request:
     branches:
       - master
-
 jobs:
   # For maven project
   build:
     strategy:
       max-parallel: 1
       matrix:
-        os: [ ubuntu-latest, windows-latest ]
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
         java: [ 17 ]
     runs-on: ${{ matrix.os }}
     name: Maven Build with Java ${{ matrix.java }} on ${{ matrix.os }}

.github/workflows/deploy.yml

@@ -0,0 +1,23 @@
+name: Deploy to the Maven Central Repository
+on:
+  release:
+    types: [ created ]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v3
+
+      - name: Install Java and Maven
+        uses: actions/setup-java@v3
+        with:
+          java-version: 17
+
+      - name: Release Maven package
+        uses: samuelmeuli/action-maven-publish@v1
+        with:
+          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg_passphrase: ${{ secrets.GPG_PASSPHRASE }}
+          nexus_username: ${{ secrets.NEXUS_USERNAME }}
+          nexus_password: ${{ secrets.nexus_password }}