Release 2.4.0 - ESP32 MIDI now supported, PDM fixes

What's Changed

• Fix PDM compiles for older SOCs by @earlephilhower in #786
• Add ConsumeSamples to Null output by @earlephilhower in #787
• Add block-based I2S write on Pico by @earlephilhower in #789
• BREAKING: Re-port MIDI, faster and lower memory, ESP32 by @earlephilhower in #790

Full Changelog: 2.3.0...2.4.0