Revert "Update module file for 1.13"

[jdolitsky]

Reverts #132

[jdolitsky]

some error on CI:

# github.com/docker/cli/cli/config                                                                                             
/go/pkg/mod/github.com/docker/cli@v0.0.0-20191007193719-3e07fa728a30/cli/config/config.go:30:19: undefined: os.UserHomeDir     
/go/pkg/mod/github.com/docker/cli@v0.0.0-20191007193719-3e07fa728a30/cli/config/config.go:111:18: undefined: os.UserHomeDir    
# github.com/docker/distribution/registry                                                                                      
/go/pkg/mod/github.com/docker/distribution@v2.7.1+incompatible/registry/registry.go:157:10: undefined: letsencrypt.Manager     
FAIL    github.com/deislabs/oras/pkg/auth/docker [build failed] 

reverting #132 until we can fix

cc @jpreese

[jpreese]

@jdolitsky

This is most likely due to the yml in the .codefresh/ dir that references golang-1.11, and the Dockerfile. The module resolution algorithm changes quite a bit from 1.11 to 1.12, and some more from 1.12 to 1.13.

Is there a way I can update the golang version that the pr/release use and test it locally? Definitely value in getting those wired up, unless I've missed it.