[update] resolver version and do not remove default features.

Author: vmarcella

.github/workflows/compile_lambda_rs.yml

@@ -60,13 +60,13 @@ jobs:
         run: cargo fmt --all --check
 
       - name: Build workspace
-        run: cargo build --workspace --features ${{ matrix.features }} --no-default-features
+        run: cargo build --workspace --features ${{ matrix.features }}
 
       - name: Build examples (lambda-rs)
-        run: cargo build -p lambda-rs --examples --features ${{ matrix.features }} --no-default-features
+        run: cargo build -p lambda-rs --examples --features ${{ matrix.features }}
 
       - name: Test workspace
-        run: cargo test --workspace --features ${{ matrix.features }} --no-default-features
+        run: cargo test --workspace --features ${{ matrix.features }}
 
       - uses: actions/setup-ruby@v1
       - name: Send Webhook Notification for build status.

Cargo.toml

@@ -1,4 +1,5 @@
 [workspace]
+resolver = "2"
 
 # Sub packages provided by lambda.
 members = [