Add the testify dependency to go.mod

Proprietary

Add a require github.com/stretchr/testify directive to go.mod when a package in the module imports testify but go.mod does not yet require it. Does not sync go.sum or add transitive dependencies; a go mod tidy is still needed to complete resolution.

org.openrewrite.golang.testify.AddTestifyDependency
mod run . --recipe=org.openrewrite.golang.testify.AddTestifyDependency

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.