Revert strategy.matrix and fix missing release mode

.github/workflows/opensk_test.yml

@@ -11,9 +11,6 @@ jobs:
   ctap2_test:
     name: CTAP2 unit tests
     runs-on: ubuntu-18.04
-    strategy:
-      matrix:
-        cargo_features: [std std,with_ctap1]
 
     steps:
       - uses: actions/checkout@v2
@@ -32,10 +29,23 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --release --features ${{ cargo_features }}
+          args: --release --features std
 
       - name: Unit testing of CTAP2 (debug mode)
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --features ${{ cargo_features }}
+          args: --features std
+
+      - name: Unit testing of CTAP2 (release mode + CTAP1)
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --release --features std,with_ctap1
+
+      - name: Unit testing of CTAP2 (debug mode + CTAP1)
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --features std,with_ctap1
+