Tweakbench updates Rebar and Cairo to v1.2

Tweakbench has updated Rebar and Cairo to v1.2.

Rebar v1.2 changes:

• New drawable waveform panel.
• Redesigned presets.
• Improved CPU usage.
• Wider host compatibility.

Cairo 1.2 changes:

• 8 new presets.
• Independent mix for filter and distortion.
• Improved cpu usage.
• Wider host compatibility.
• Fixed an automation bug on the speed parameter: can now be automated on CC 23 (or by auto-linking to the up/down buttons).