Ink fails to build since it depends on oper and the project's github repository has since been deleted.

To reproduce this you can clone the ink repository and attempt to build it by running Running go get https://github.com/inkproject/ink or by using these commands

git clone https://github.com/inkproject/ink
cd ink
go build

The go build command outputs the following error

serve.go:11:2: cannot find package "github.com/taadis/oper" in any of:
	/usr/lib/go/src/github.com/taadis/oper (from $GOROOT)
	/home/sam/go/src/github.com/taadis/oper (from $GOPATH)

This has been tested on Arch Linux with the 5.8.9-arch2-1 kernel and also MacOS however the build will fail on all operating systems since the issue occurs at the Go level.

I've already fixed the issue locally so I'll be submitting a pull request very soon