Migrate to Spago v1 #315

Client is on legacy Spago (v0.20.9).

From briefly looking into migrating to latest Spago, there's an apparent obstacle in that the NPM scripts rely on legacy --path to include either the dev or prod version of the Try.Config.purs module.

  -p,--path PATH           Source path to include (in addition to paths in
                           spago.dhall)

I'm not seeing a direct replacement for --path in Spago v1. The alternatives that come to mind:

1. Add a step to each script that copies the correct Try.Config.purs into src before bundling (and add src/Try.Config.purs to .gitignore).
2. Separate packages for -dev and -prod (each containing only Try.Config module in src) with shared dependency on what's currently in the top-level package.