I would recommend updating the article to use the *CURRENT* version of go, not a year and a half old release. The only reason I am not removing the article (off topic for JS site) is that it *could* be useful to someone that wants to use Go for webassembly development.
Go and Rust in particular seem to be two of the better options for wasm. C# is gaining some ground. C/C++ are also options, but often require more tweaking and knowledge to get started with.