ScratchCPP Render 0.2.1

Change log:

• Fixed handling of special keys such as arrow keys, space, etc. (#71)
• Updated libscratchcpp to v0.7.2 (https://github.com/scratchcpp/libscratchcpp/releases/tag/v0.7.2).

Full Changelog: v0.2.0...v0.2.1