Upgrade Sapper and update issue link

[babichjacob]

The workaround is still necessary for me on Sapper >= 0.27.15.

For example, try passing

{
    files: ["not-exist.ts"],
}

as options to typescript(/* here */). You get the opaque error

@rollup/plugin-typescript: Couldn't process compiler options

without the explanatory warning

(typescript plugin) @rollup/plugin-typescript TS5023: Unknown compiler option 'files'.

[benmccann]

Gahhh!!!!! :sob: I really thought I had them all fixed

[benmccann]

Actually, I just tested this and the error showed up for me:

cross-env NODE_ENV=production sapper build --legacy

Building... @rollup/plugin-typescript TS5023: Unknown compiler option 'files'.

[!] (plugin typescript) Error: @rollup/plugin-typescript: Couldn't process compiler options Error: @rollup/plugin-typescript: Couldn't process compiler options

Maybe the issue is just that it printed multiple errors and you missed the explanation above the last error? I'm not sure what Rollup would do here, but if we can make the output closer I guess that we could make an enhancement request to Sapper

[babichjacob]

Oh, so it works during prod but not dev

[benmccann]

Ohh. Yeah, I was testing with npm run build

I filed an issue and updated this PR to use the new issue link. It's probably still worth upgrading Sapper here since it fixes three other issues with swallowing errors. Too bad there's a fourth :stuck_out_tongue: