allow tests to run in browser

Sometimes it happens that some library we depend on is not suppored by browser (e.g. "util/types", see fix https://github.com/eclipse-zenoh/zenoh-ts/pull/216).

To avoid such problems it makes sense to build our set of tests to be executed in browser. Along with https://github.com/eclipse-zenoh/zenoh-ts/issues/223 this should guarantee that zenoh-ts is fully browser compatible.