Add wasm32 target

.github/workflows/build_and_test.yml

@@ -36,6 +36,7 @@ jobs:
         prefix-key: "linux"
     - name: Build, Test and Publish Coverage
       run: |
+        rustup target add wasm32-unknown-unknown
         if [ -n "${{ secrets.COVERALLS_REPO_TOKEN }}" ]; then
           curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash
           cargo binstall --no-confirm cargo-tarpaulin --force
@@ -70,4 +71,6 @@ jobs:
         cache-all-crates: "true"
         prefix-key: "macos"
     - name: Build, Test wasm with Safari
-      run: SAFARIDRIVER=$(which safaridriver) cargo test --target wasm32-unknown-unknown --no-default-features --features="client, rt"
+      run: |
+        rustup target add wasm32-unknown-unknown
+        SAFARIDRIVER=$(which safaridriver) cargo test --target wasm32-unknown-unknown --no-default-features --features="client, rt"