Setup GoReleaser (#42)

fix lint

add isc license to the list in the readme

Delete vendor directory (#35)

* Delete vendor directory

* Replace dingdayu/auto-go-format action

dingdayu/auto-go-format has not recieved active development in quite some time and none of the forks are active either. This replaces its functionality without the random breaks that happen from time to time, see #35.

v5

v4

fix #22: bad usage of go modules

initial v2

Handle HTTP errors specially

Otherwise, simply logging the error prints the client ID
and client secret to console in plain text as part of the
URL.