Merge remote-tracking branch 'visualfc/master'

js: Enable to compile Oto with Go 1.14

Updates hajimehoshi/ebiten#1024

darwin: Bug fix: Pause the audio when input does not come

Updates hajimehoshi/ebiten#975

Bug fix: build error on GopherJS

ios: Fix comments

darwin: Add error handlings

Update README

Add Diane to AUTHORS

Revert "openal: Use dummyDriver when no sound driver is found"

This reverts commit 5407e1c.

Reason: I could not found actual cases 'device not found'

Update go.mod

Now `syscall/js` is imported for both GopherJS and Wasm, go.mod
doesn't have to include github.com/gopherjs/gopherjs.