C Apis: Envelope is missing some functions from the LUA Apis

SDK Bug Reports
1

The following are in LUA but not in C, for the Envelope type:

playdate.sound.envelope:setScale(scale)
playdate.sound.envelope:setOffset(offset)
playdate.sound.envelope:trigger(velocity, [length])
playdate.sound.envelope:setGlobal(flag)

And while we're here, the LUA docs for playdate.sound.envelope:setRelease(release) have an error where they refer to the argument as attack.