Simplified build script

Author: gastaldi

.github/workflows/build.yml

@@ -31,26 +31,15 @@ jobs:
     steps:
       - name: Prepare git
         run: git config --global core.autocrlf false
-       
+        if: startsWith(matrix.os, 'windows')
+
       - uses: actions/checkout@v2
       - name: Set up JDK 11
         uses: actions/setup-java@v2
         with:
           distribution: temurin
           java-version: 11
-
-      - name: Get Date
-        id: get-date
-        run: |
-          echo "::set-output name=date::$(/bin/date -u "+%Y-%m")"
-        shell: bash
-      - name: Cache Maven Repository
-        id: cache-maven
-        uses: actions/cache@v2
-        with:
-          path: ~/.m2/repository
-          # refresh cache every month to avoid unlimited growth
-          key: maven-repo-${{ runner.os }}-${{ steps.get-date.outputs.date }}
+          cache: 'maven'
 
       - name: Build with Maven
         run: mvn -B formatter:validate verify --file pom.xml