v0.0.4

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Added

• Wav class, for writing wav files (only supports 32-bit float format)
• Generator class, base class for PulseGen, WaveGen and NoiseGen
• PulseGen class, similar to the previously removed PulseChannel
• WaveGen class, similar to the previously removed WaveChannel
• Mixer class, adds bandlimited steps to left/right channels
• Sequencer class, similar to the previously removed one

Changed

• Minimum required C++ standard is now C++17
• PlaybackQueue uses float samples instead of int16_t
• Synth was rewritten to use emulation based synthesis, generates samples on a per frame basis.
• Synth can now read and write APU registers
• reset() renamed to restart() in synth APU components
• setRegister renamed to writeRegister
• Sweep has its own shadow register and now longer uses the channel's on trigger (this behavior now matches the hardware)
• Sweep and Envelope register contents get applied on restart

Removed

• include/trackerboy/synth/utils.hpp, no longer being used
• libtrackerboy/synth/test_Osc.cpp, was unused
• Osc, PulseOsc and WaveOsc, since we are now using emulation based synthesis