build and test each crate separately (ZcashFoundation#689)

* build and test each crate separately

* frost-core: fix benchmark compilation

.github/workflows/main.yml

@@ -38,15 +38,20 @@ jobs:
       - uses: dtolnay/[email protected]
       - run: cargo build --all-features
 
-  build_all_features:
-    name: build with all features combinations
+  test_all_features:
+    name: test all features combinations
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/[email protected]
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo install cargo-all-features
-      - run: cargo build-all-features
+      # We check and then test because some test dependencies could help
+      # a bugged build work, while a regular build would fail.
+      - run: cargo check-all-features --release
+      # Note that this also tests each crate separately, which also helps
+      # catching some issues.
+      - run: cargo test-all-features --release
 
   build_no_std:
     name: build with no_std

frost-core/Cargo.toml

@@ -44,6 +44,7 @@ serde_json = { version = "1.0", optional = true }
 criterion = { version = "0.5", optional = true }
 
 [dev-dependencies]
+criterion = { version = "0.5" }
 lazy_static = "1.4"
 proptest = "1.0"
 rand = "0.8"