Web-audio-api

- Breaking: the ScriptProcessorNode::set_onaudioprocess no longer takes a ref to the event
- Fixed a panic for multi-channel output with the ScriptProcessorNode
- Fixed an issue when calling suspend/close on an already suspended context

- Changed: enforce minimum 2k and maximum 384k Hertz sample rate for audio contexts
- Added the ScriptProcessorNode
- Fix: all events are now dispatched for OfflineAudioContext
- Fix: BiquadFilter/IIRFilterNode freq response return NaN for invalid frequencies
- Fix: do not allow length 0 for OfflineAudioContext and AudioBuffer

- Breaking: ChannelConfigOptions is renamed to AudioNodeOptions
- Fix WaveShaperNode: do not emit silence for non-centric curve
- Fix DynamicsCompressorNode: handle channel constraints
- Fixed error messages and constraints for DestinationNode and ChannelSplitter/MergerNode

- Changed: the AudioContext will continue playing if it is dropped (use `close()` instead)
- Apply AudioParamDescriptor validations
- Apply limits of compound AudioParams
- Fix AudioParam rounding errors
- Fix k-rate AudioParams not always delivering constant value
- Fixed a panic while rendering AudioParams with dynamic lifetimes
- Disallow constructing an AudioBuffer with length zero

- Breaking: the AudioProcessor trait is now superseded by AudioWorkletProcessor
- Breaking: the RenderScope struct is renamed to AudioWorkletGlobalScope
- Added message port functionality to AudioWorkletNode and AudioWorkletProcessor
- Added OfflineAudioContext event handlers
- Added validation of AudioScheduledSourceNode start/stop actions
- Fixed a bug with min/max decibels in the AnalyserNode
- Fixed panic in AudioBufferSourceNode when duration exceeds buffer length

- Fix excessive buffer size (latency) on Android