[ci] Update spine-libgdx workflow

.github/workflows/settings.xml

@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
-          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
-  <servers>
-    <server>
-      <id>sonatype-nexus-snapshots</id>
-      <username>${env.SONATYPE_USER}</username>
-      <password>${env.SONATYPE_PASSWORD}</password>
-    </server>
-    <server>
-      <id>sonatype-nexus-staging</id>
-      <username>${env.SONATYPE_USER}</username>
-      <password>${env.SONATYPE_PASSWORD}</password>
-    </server>
-  </servers>
-
-  <profiles>
-    <profile>
-      <id>gpg</id>
-      <properties>
-        <gpg.executable>gpg</gpg.executable>
-        <gpg.passphrase>${env.GPG_PASSWORD}</gpg.passphrase>
-      </properties>
-    </profile>
-  </profiles>
-  <activeProfiles>
-    <activeProfile>gpg</activeProfile>
-  </activeProfiles>
-</settings>

.github/workflows/spine-libgdx.yml

@@ -7,18 +7,27 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v1
-    - name: Set up JDK 1.7
+    - name: Set up JDK 1.8
       uses: actions/setup-java@v1
       with:
-        java-version: 1.7
+        java-version: 1.8
+        server-id: sonatype-nexus-snapshots
+        server-username: MAVEN_USERNAME
+        server-password: MAVEN_PASSWORD
+
+    - name: Cache Maven packages
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+
     - name: Build spine-libgdx
-      working-directory: spine-libgdx/spine-libgdx
+      working-directory: spine-libgdx/spine-libgdx      
+      run: mvn clean deploy
       env:
-        SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
-        SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
-      run: mvn -s ../../.github/workflows/settings.xml clean deploy
+          MAVEN_USERNAME: ${{ secrets.SONATYPE_USER }}
+          MAVEN_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}