Ensure scratch-* dependencies are up to date
Ensure scratch-* dependencies are up to date

With node_modules cached, npm install sees the scratch-* dependencies satisfied (since if any version 0.1.0-prepublish.x satisfies ^0.1.0-prepublish).  So remove these before the install step to ensure the latest version is installed.

TheBrokenRail/scratch-vm,TheBrokenRail/scratch-vm,LLK/scratch-vm,LLK/scratch-vm,LLK/scratch-vm