Needs fixes for Mac/ARM

[ItalyPaleAle]

Prerequisites

• I searched to see if the issue already exists.

Description

When running on macOS with Apple Silicon (ARM), the script correctly identifies the environment as GOOS=darwin and GOARCH=arm64

However, that combination will not be supported until Go 1.16

1. For now (Go 1.15), gobinaries should ignore arm64 when using darwin, and instead return the amd64 binary
2. When Go 1.16 is out, gobinaries could be updated to support arm64

[egoist]

Go 1.16 has been released. 😄

[tj]

niice :D I'll try to remeber to re-deploy gobinaries next week

[cohix]

++ hoping for darwin/arm64 support soon :D

EDIT: happy to help testing with my M1 Mini

[egoist]

Go 1.16 is also required for go:embed feature