Upgrade gomixing lib

Upgrade to Go 1.18

Clean up file writers

- expose device kind information

Updating mixing library

Moved many platform-specific functions out

- github.com/heucuva/go-win32
- github.com/heucuva/go-winmm
- github.com/heucuva/go-directsound

Rework directsound to be more reasonable

Added easier getter for device kind.

Actually provide device details

Updated gomixing to v1.0.7

- includes sample overflow protection

Updating to use MixerVolume value

- using updated gomixing library