WASM Build In CI

Related to issue #135, since none of the test suite runs against the WASM build would it be worth it to add a WASM build step in the way an end user would build it to the CI tests? Since there are areas of the code that only compile and run if the build is for WASM these currently never get tested.

If yes maybe also add it as a test to run with the same settings in the contributing guide?