Update `yarn.lock` after manual `package.json` changes (#2097)
Update `yarn.lock` after manual `package.json` changes (#2097)

To update the following dependencies…

- electron-updater
- electron-builder
- electron-publisher-s3
- spectron

…`package.json` was mistakenly updated manually which prevented an update
of `yarn.lock`.

This change brings them in sync.
nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop