bump gotest.tools v3.0.1 for compatibility with Go 1.14

full diff: https://github.com/gotestyourself/gotest.tools/compare/v2.3.0...v3.0.1

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

internal/test/environment/testenv.go

@@ -8,9 +8,9 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
-	"gotest.tools/icmd"
-	"gotest.tools/poll"
-	"gotest.tools/skip"
+	"gotest.tools/v3/icmd"
+	"gotest.tools/v3/poll"
+	"gotest.tools/v3/skip"
 )
 
 // Setup a new environment

internal/test/strings.go

@@ -4,8 +4,8 @@ import (
 	"strings"
 	"testing"
 
-	"gotest.tools/assert"
-	is "gotest.tools/assert/cmp"
+	"gotest.tools/v3/assert"
+	is "gotest.tools/v3/assert/cmp"
 )
 
 // CompareMultipleValues compares comma-separated values, whatever the order is