Replace existing CI actions with the one from the .github repository

Closes #40.
Replaced the maven build and package publish actions with the ones from the .github repository.

.github/workflows/maven_macos.yml → .github/workflows/maven_build.yml

@@ -1,7 +1,7 @@
 # This workflow will build a Java project with Maven
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
 
-name: Maven build - MacOS latest
+name: Maven build - clean test verify
 
 on:
   push:
@@ -11,17 +11,20 @@ on:
 
 jobs:
   build:
-
-    runs-on: macos-latest
-
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        # Other versions of java can be configured as well - https://github.com/actions/setup-java#basic
+        java: [14.0.1]
     steps:
     - uses: actions/checkout@v2
     - name: Checkout submodules
       run: git submodule update --init --recursive
-    - name: Set up JDK 14
+    - name: Set up JDK
       uses: actions/setup-java@v1
       with:
-        java-version: '14.0.1'
+        java-version: ${{ matrix.java }}
     - name: Cache Maven packages
       uses: actions/cache@v2
       with:

.github/workflows/package_publish.yml

@@ -1,7 +1,7 @@
 # This workflow will build a package using Maven and then publish it to GitHub packages when a release is created
 # For more information see: https://github.com/actions/setup-java#apache-maven-with-a-settings-path
 
-name: Publish to GitHub packages
+name: Maven package and publish - package verify deploy
 
 on:
   release:
@@ -29,4 +29,4 @@ jobs:
       - name: Publish to GitHub Packages Apache Maven
         run: mvn deploy -e -X -s $GITHUB_WORKSPACE/settings.xml
         env:
-          GITHUB_TOKEN: ${{ github.token }}
+          GITHUB_TOKEN: ${{ github.token }}