refactor: now utils is an internal package (#166)

Let us make internal everything because this is not a library.

internal/log/handlers/cli/cli.go

@@ -11,7 +11,7 @@ import (
 	"github.com/apex/log"
 	"github.com/fatih/color"
 	colorable "github.com/mattn/go-colorable"
-	"github.com/ooni/probe-cli/utils"
+	"github.com/ooni/probe-cli/internal/utils"
 )
 
 // Default handler outputting to stderr.

internal/log/handlers/cli/measurements.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/apex/log"
-	"github.com/ooni/probe-cli/utils"
+	"github.com/ooni/probe-cli/internal/utils"
 )
 
 func statusIcon(ok bool) string {

internal/log/handlers/cli/results.go

@@ -9,7 +9,7 @@ import (
 
 	"github.com/apex/log"
 	"github.com/ooni/probe-cli/internal/database"
-	"github.com/ooni/probe-cli/utils"
+	"github.com/ooni/probe-cli/internal/utils"
 )
 
 func formatSpeed(speed float64) string {