Use ooni/probe-engine 0.12.0+patches (#133)

* nettests/groups.go: remove redundant struct names

* go.mod go.sum: update deps except probe-engine

* Update to ooni/probe-engine@e768161f91

The API has changed. Methods that used to change bits of the session have
been removed. Now the session is more immutable than before.

As such, we need to completely fill the config before using it.

* Set IncludeCountry to always true

Co-authored-by: Arturo Filastò <arturo@filasto.net>

nettests/http_invalid_request_line.go

@@ -10,7 +10,7 @@ type HTTPInvalidRequestLine struct {
 
 // Run starts the test
 func (h HTTPInvalidRequestLine) Run(ctl *Controller) error {
-	builder, err := ctl.Ctx.Session.NewExperimentBuilder(
+	builder, err := ctl.Session.NewExperimentBuilder(
 		"http_invalid_request_line",
 	)
 	if err != nil {