ScratchCPP Render 0.4.1

Change log:

• Fixed SVG scaling glitches when changing the stage scale (#95).
• Enabled smooth sampling for SVG costumes for less pixelated images (#97).
• Updated libscratchcpp to v0.8.1 (https://github.com/scratchcpp/libscratchcpp/releases/tag/v0.8.1).

Full Changelog: v0.4.0...v0.4.1