When doing a pre-release, don't bother merging to master and develop.
When doing a pre-release, don't bother merging to master and develop.

This assumes that we'll eventually do a proper release (or merge the prerel
manually), and saves twiddling the package.json on downstream projects for each
prerelease.

krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk