circleci: failing on .circleci/install-toxiproxy.sh

[Trek Hopton]

When circleci runs .circleci/install-toxiproxy.sh, it fails and gives the below output.

go mod download
go: modules disabled by GO111MODULE=off; see 'go help modules'
make: *** [Makefile:22: setup] Error 1

Exited with code exit status 2

I’m not sure what to make of it. Not sure what has changed since it was working. Perhaps it has been updated and needs reconfiguration.

This needs to be fixed before we can continue to run CI on our code.

[Trek Hopton]

Resolved in PR #90.