travis: trigger wasm build ?

.travis.yml

@@ -40,7 +40,7 @@ script:
   # skipping clippy ...
   - BUILD_DUMMY_WASM_BINARY=1 cargo clippy --release --target=${TARGET} -- -D warnings
   - BUILD_DUMMY_WASM_BINARY=1 cargo test --release --verbose --all --target=${TARGET}
-  - BUILD_DUMMY_WASM_BINARY=0 WASM_BUILD_TOOLCHAIN=nightly-2020-05-23 cargo build --release --target=${TARGET} -p joystream-node
+  - TRIGGER_WASM_BUILD=1 WASM_BUILD_TOOLCHAIN=nightly-2020-05-23 cargo build --release --target=${TARGET} -p joystream-node
   - ls -l ./target/${TARGET}/release/wbuild/target/wasm32-unknown-unknown/release/
 
 before_deploy: