libscratchcpp 0.11.2

Change log:

• Fixed a crash when using unsupported graphic effects.
• Fixed "stop other scripts in stage" block not working (#583).
• Fixed "broadcast and wait" block not waiting for all broadcasts with the same name, but different case, e. g. "message1" and "Message1" (#578).

Full Changelog: v0.11.1...v0.11.2