fix a few multiaddr import paths, remove self reference in go.mod

2 jobs for master in 35 seconds (queued for 49 seconds)
latest
Status Job ID Name Coverage
  Build
failed #3943
testing
build

00:00:35

 
  Test
skipped #3945
testing
test
 
Name Stage Failure
failed
build Build
$ cd $CI_PROJECT_DIR
$ echo $CI_JOB_STAGE
build
$ go build
go: github.com/multiformats/go-multibase@v0.2.0 requires
github.com/mr-tron/base58@v1.1.0: missing go.sum entry; to add it:
go mod download github.com/mr-tron/base58
Cleaning up project directory and file based variables
ERROR: Job failed: exit status 1