GH Actions: Add cached for bundler and pods

.github/workflows/simulator.yml

@@ -18,8 +18,27 @@ jobs:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
 
-      - name: Setup
-        run: bundle install
+      # Cocoapods cache
+      - uses: actions/cache@v2
+        with:
+          path: Pods
+          key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-pods-
+
+      # Bundler cache
+      - uses: actions/cache@v2
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
+
+
+      - name: Bundle install
+        run: |
+          bundle config path vendor/bundle
+          bundle install --jobs 4 --retry 3
         
       - name: Use right MatrixKit and MatrixSDK versions
         run: bundle exec fastlane point_dependencies_to_pending_releases