Tag next version with changelog

[nazar-pc]

Now that noise-c.wasm looks ready for use, I'd like to ask you to tag changes in this library with changelog, so that it is possible to follow updates.

It is especially important for noise-c.wasm, since it is just a port to another language, and it should be clear to which version of upstream noise-c each particular release of nosie-c.wasm belongs.

My suggestion would be semantic versioning like 1.0.0+noise-32 to specify both library version and Noise spec version it implements.