chore(ci): use caching

Author: metacosm

.github/workflows/master-snapshot-release.yml

@@ -27,10 +27,11 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-maven-
       - name: Set up Java and Maven
-        uses: actions/setup-java@v2.3.0
+        uses: actions/setup-java@v2
         with:
           distribution: ${{ matrix.distribution }}
           java-version: ${{ matrix.java }}
+          cache: 'maven'
       - name: Run unit tests
         run: ./mvnw ${MAVEN_ARGS} -B test --file pom.xml
       - name: Set up Minikube
@@ -47,10 +48,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Java and Maven
-        uses: actions/setup-java@v2.3.0
+        uses: actions/setup-java@v2
         with:
           distribution: temurin
           java-version: 11
+          cache: 'maven'
       - name: Release Maven package
         uses: samuelmeuli/action-maven-publish@v1
         with:

.github/workflows/pr.yml

@@ -27,10 +27,11 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-maven-
       - name: Set up Java and Maven
-        uses: actions/setup-java@v2.3.0
+        uses: actions/setup-java@v2
         with:
           distribution: ${{ matrix.distribution }}
           java-version: ${{ matrix.java }}
+          cache: 'maven'
       - name: Check code format
         run: ./mvnw ${MAVEN_ARGS} formatter:validate -Dconfigfile=$PWD/contributing/eclipse-google-style.xml --file pom.xml
       - name: Run unit tests

.github/workflows/release.yml

@@ -10,10 +10,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Java and Maven
-        uses: actions/setup-java@v2.3.0
+        uses: actions/setup-java@v2
         with:
           java-version: 11
           distribution: temurin
+          cache: 'maven'
       - name: change version to release version
         # Assume that RELEASE_VERSION will have form like: "v1.0.1". So we cut the "v"
         run: ./mvnw ${MAVEN_ARGS} versions:set -DnewVersion="${RELEASE_VERSION:1}" versions:commit
@@ -34,10 +35,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Java and Maven
-        uses: actions/setup-java@v2.3.0
+        uses: actions/setup-java@v2
         with:
           java-version: 11
           distribution: temurin
+          cache: 'maven'
       - name: change version to release version
         run: |
           ./mvnw ${MAVEN_ARGS} versions:set -DnewVersion="${RELEASE_VERSION:1}" versions:commit