Bump scratch-vm

Bumps [scratch-vm](https://github.com/LLK/scratch-vm) from 0.2.0-prerelease.20200616200729 to 0.2.0-prerelease.20200622143012.
- [Release notes](https://github.com/LLK/scratch-vm/releases)
- [Commits](https://github.com/LLK/scratch-vm/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -37,7 +37,7 @@
     "jsdoc": "^3.5.5",
     "json": "^9.0.4",
     "playwright-chromium": "^1.0.1",
-    "scratch-vm": "0.2.0-prerelease.20200616200729",
+    "scratch-vm": "0.2.0-prerelease.20200622143012",
     "tap": "^11.0.0",
     "travis-after-all": "^1.4.4",
     "uglifyjs-webpack-plugin": "^1.2.5",