Readme improvements

* set-output in favor of GITHUB_OUTPUT
* upgrading checkout action to v3 in test

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Should extract GAV
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Extract GAV
       id: extract
       uses: ./

README.md

@@ -11,6 +11,11 @@ This *GitHub Action* extracts GAV from `pom.xml`, i.e.:
 
 Why should I need this? For example, to **name** and **tag** a Docker image built upon your artifact or **pass as parameters** to a dispatched workflow.
 
+## Versioning
+This project follows *Semantic Versioning* according to [GitHub Actions versioning practice](https://github.com/actions/toolkit/blob/main/docs/action-versioning.md)
+
+>Current stable version is `v2`
+
 ## Prerequirements
 
 This action expects you to have `maven` available in your workflow environment
@@ -42,14 +47,15 @@ jobs:
     runs-on: ubuntu-latest
     name: Should extract GAV
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up JDK 11
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v2
       with:
         java-version: 11
+        distribution: temurin
     - name: Extract GAV
       id: extract
-      uses: andreacomo/maven-gav-extractor@v1
+      uses: andreacomo/maven-gav-extractor@v2
     - name: Log GAV
       run: |
         echo ${{ steps.extract.outputs.group-id }}

action.yml

@@ -30,14 +30,14 @@ runs:
         EVALUATE: org.apache.maven.plugins:maven-help-plugin:3.2.0:evaluate
       run: |
         VALUE=$(mvn -f ${{ inputs.pom-location }} $EVALUATE -Dexpression=project.groupId -q -DforceStdout)
-        echo "::set-output name=group-id::$VALUE"
+        echo "group-id=$VALUE" >> $GITHUB_OUTPUT
 
         VALUE=$(mvn -f ${{ inputs.pom-location }} $EVALUATE -Dexpression=project.artifactId -q -DforceStdout)
-        echo "::set-output name=artifact-id::$VALUE"
+        echo "artifact-id=$VALUE" >> $GITHUB_OUTPUT
         
         VALUE=$(mvn -f ${{ inputs.pom-location }} $EVALUATE -Dexpression=project.version -q -DforceStdout)
-        echo "::set-output name=version::$VALUE"
+        echo "version=$VALUE" >> $GITHUB_OUTPUT
         
         VALUE=$(mvn -f ${{ inputs.pom-location }} $EVALUATE -Dexpression=project.name -q -DforceStdout)
-        echo "::set-output name=name::$VALUE"
+        echo "name=$VALUE" >> $GITHUB_OUTPUT
       shell: bash