Add coverage check

Use stable

cd

Author: termoshtt

.github/workflows/rust.yml

@@ -23,3 +23,20 @@ jobs:
     - uses: actions-rs/cargo@v1
       with:
         command: clippy
+
+  coverage:
+    runs-on: ubuntu-18.04
+    container:
+      image: rustmath/mkl-rust:1.43.0
+      options: --security-opt seccomp=unconfined
+    steps:
+      - uses: actions/checkout@v2
+      - name: Generate code coverage
+        run: |
+          cd ndarray-linalg
+          cargo tarpaulin --verbose --features=intel-mkl --out Xml
+          mv *.xml ..
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v1
+        with:
+          fail_ci_if_error: true