✨ 优化 github actions。

.github/workflows/test-and-build.yml

@@ -11,6 +11,13 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 8
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
       - name: Build with Maven
         run: mvn package
   buildOnJava11:
@@ -22,5 +29,12 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 11
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
       - name: Build with Maven
         run: mvn package