`jco run --help` does not work

[whitequark]

At version 0.14.1:

$ ~/.npm-packages/bin/jco run --help
error: unknown option '--help'
(Did you mean --help?)

[guybedford]

This is a kind of CLI parsing thing issue in our underlying command line parser where jco run component.wasm ...args] will pass all the args to the thing being run.

We could an exception for a --help argument immediately after the run command, that seems sensible to me.

[guybedford]

Fixed in #307.

[whitequark]

Thanks!