Merge pull request #19 from dolab/feature/go-mod

What: bomb to v1.4.0

Merge pull request #18 from dolab/assertions

What: update assert to v1.3.0

Merge pull request #17 from dolab/request-race

What: add mux to request

Merge pull request #16 from dolab/client

What: rename Testing to Client

Merge pull request #15 from dolab/assertions

What: refactor httptesting

Merge pull request #14 from dolab/assertions

Assertions