fix: update yarn.lock, otherwise install fails with cryptic error

[amcgee]

The following error (cryptic at best) occurred because yarn.lock wasn't correctly updated in the shell and shell adapter. This was problematic specifically because we run yarn install --frozen-lockfile --prefer-offline, which means the lockfile can't be out of date.

error Couldn't find package "@dhis2/ui-core@^3.12.0" required by "@dhis2/app-adapter@file:./adapter" on the "npm" registry.
 info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
 Error: Couldn't find package "@dhis2/ui-widgets@^2.0.0" required by "@dhis2/app-adapter@file:./adapter" on the "npm" registry.
    at MessageError.ExtendableBuiltin (/Users/awm/.yarn/lib/cli.js:721:66)
    at new MessageError (/Users/awm/.yarn/lib/cli.js:750:123)
    at PackageRequest.<anonymous> (/Users/awm/.yarn/lib/cli.js:36528:17)
    at Generator.throw (<anonymous>)
    at step (/Users/awm/.yarn/lib/cli.js:304:30)
    at /Users/awm/.yarn/lib/cli.js:317:13

Side note : we should add functional "can bootstrap and run an app from scratch" tests

[amcgee]

@varl going ahead with this merge, since prod is broken.

[dhis2-bot]

🎉 This PR is included in version 1.5.7 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[varl]

OK! Looks good from here.

…

On November 6, 2019 4:18:35 PM GMT+01:00, Austin McGee ***@***.***> wrote: Merged #150 into master. -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: #150 (comment)

-- Sent from my Android device with K-9 Mail. Please excuse my brevity.