Update Github Actions

Author: koji-1009

.github/workflows/pr_check.yml

@@ -9,24 +9,71 @@ jobs:
   danger:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - name: Checkout
+        uses: actions/[email protected]
+
+      - name: Bundler Cache
+        uses: actions/[email protected]
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
       - name: Setup Ruby for use with actions
         uses: actions/[email protected]
         with:
-          ruby-version: '2.6'
-          architecture: 'x64'
-      - name: Install danger
+          ruby-version: '2.7'
+      - name: Install Danger
         run: |
           gem install bundler
-          bundle install
+          bundle config set path 'vendor/bundle'
+          bundle config set clean 'true'
+          bundle check || bundle install --jobs 4 --retry 3
+
+      - name: Gradle dist Cache
+        uses: actions/[email protected]
+        with:
+          path: ~/.gradle/wrapper
+          key: ${{ runner.os }}-dist-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
+      - name: Gradle dependencies Cache
+        uses: actions/[email protected]
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-v1-gradle-${{ hashFiles('./build.gradle') }}-${{ hashFiles('**/build.gradle') }}
+          restore-keys: |
+            ${{ runner.os }}-v1-gradle-${{ hashFiles('./build.gradle') }}-
+            ${{ runner.os }}-v1-gradle-
+      - name: Download Dependencies
+        run: |
+          ./gradlew androidDependencies --no-daemon
+
       - name: Run danger
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: danger
+
   unit_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - name: Checkout
+        uses: actions/[email protected]
+
+      - name: Gradle dist Cache
+        uses: actions/[email protected]
+        with:
+          path: ~/.gradle/wrapper
+          key: ${{ runner.os }}-dist-gradle-${{ hashFiles('**/gradle-wrapper.properties') }}
+      - name: Gradle dependencies Cache
+        uses: actions/[email protected]
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-v1-gradle-${{ hashFiles('**/build.gradle') }}
+          restore-keys: |
+            ${{ runner.os }}-v1-gradle-
+      - name: Download Dependencies
+        run: |
+          ./gradlew androidDependencies --no-daemon
+
       - name: Run unit test
         run: ./gradlew studyplus-android-sdk:test