Update gradle and git checkout (#6090)

* Update "actions/checkout" from v1 to v2 --> See https://github.com/actions/checkout
* Update gradle from 6.2.1 to 6.2.2 --> See https://docs.gradle.org/6.2.2/release-notes.html

Author: koppor

.github/workflows/tests.yml

@@ -13,10 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v1
-        with:
-          depth: 1
-          submodules: false
+        uses: actions/checkout@v2
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
@@ -42,10 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v1
-        with:
-          depth: 1
-          submodules: false
+        uses: actions/checkout@v2
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
@@ -89,10 +83,7 @@ jobs:
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - name: Checkout source
-        uses: actions/checkout@v1
-        with:
-          depth: 1
-          submodules: false
+        uses: actions/checkout@v2
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
@@ -138,10 +129,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v1
-        with:
-          depth: 1
-          submodules: false
+        uses: actions/checkout@v2
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
@@ -180,10 +168,7 @@ jobs:
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - name: Checkout source
-        uses: actions/checkout@v1
-        with:
-          depth: 1
-          submodules: false
+        uses: actions/checkout@v2
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.2.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists