build(deps): bump scratch-blocks

Bumps [scratch-blocks](https://github.com/LLK/scratch-blocks) from 0.1.0-prerelease.20201212061701 to 0.1.0-prerelease.20201213034048.
- [Release notes](https://github.com/LLK/scratch-blocks/releases)
- [Commits](https://github.com/LLK/scratch-blocks/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -74,7 +74,7 @@
     "redux": "3.7.2",
     "redux-throttle": "0.1.1",
     "scratch-audio": "0.1.0-prerelease.20200528195344",
-    "scratch-blocks": "0.1.0-prerelease.20201212061701",
+    "scratch-blocks": "0.1.0-prerelease.20201213034048",
     "scratch-l10n": "3.10.20201212031431",
     "scratch-storage": "1.3.3",
     "scratch-vm": "0.2.0-prerelease.20201125065300",