Add test with no-feature

Author: termoshtt

.github/workflows/intel-mkl-sys.yml

@@ -15,6 +15,7 @@ jobs:
           - ghcr.io/rust-math/rust-mkl:1.62.1-2020.1
           - rust:1.62.1
         feature:
+          - ""
           - mkl-static-lp64-iomp
           - mkl-static-lp64-seq
           - mkl-static-ilp64-iomp
@@ -49,7 +50,6 @@ jobs:
           command: test
           args: >
             --manifest-path=intel-mkl-sys/Cargo.toml
-            --no-default-features
             --features=${{ matrix.feature }}
 
   windows: