add WASM build check to CI

Author: Zk-nd3r

.github/workflows/ci.yml

@@ -23,3 +23,8 @@ jobs:
 
       - name: Run tests
         run: cargo test --all-targets
+
+      - name: WASM target compiles
+        run: |
+          rustup target add wasm32-unknown-unknown
+          cargo build --target wasm32-unknown-unknown --lib