v0.1.0

add functions
- `midicps(midi: number): number`
- `cpsmidi(cps: number): number`
- `midiratio(midi: number): number`
- `ratiomidi(ratio: number): number`
- `dbamp(db: number): number`
- `ampdb(amp: number): number`
- `linlin(value: number, inMin, inMax, outMin, outMax): number`
- `linexp(value: number, inMin, inMax, outMin, outMax): number`
- `explin(value: number, inMin, inMax, outMin, outMax): number`
- `expexp(value: number, inMin, inMax, outMin, outMax): number`