Update CI tasks to include tests with no default features

Author: corrideat

.github/workflows/ci.yml

@@ -33,6 +33,7 @@ jobs:
       matrix:
         features:
           - --all-features
+          - --no-default-features
           - --no-default-features --features ring
           - --no-default-features --features aws_lc_rs
           - --no-default-features --features aws_lc_rs,pem
@@ -137,6 +138,8 @@ jobs:
       run: cargo test --verbose --features x509-parser --all-targets
     - name: Run the tests with aws_lc_rs backend enabled
       run: cargo test --verbose --no-default-features --features aws_lc_rs,pem --all-targets
+    - name: Run the tests with no features enabled
+      run: cargo test --verbose --no-default-features --all-targets
 
   build:
     strategy: