build: upgrade to go 1.17 and upgrade dependencies

vendor/gocv.io/x/gocv/mat_noprofile.go

@@ -8,6 +8,11 @@ package gocv
 */
 import "C"
 
+// addMatToProfile does nothing if matprofile tag is not set.
+func addMatToProfile(p C.Mat) {
+	return
+}
+
 // newMat returns a new Mat from a C Mat
 func newMat(p C.Mat) Mat {
 	return Mat{p: p}
@@ -17,5 +22,6 @@ func newMat(p C.Mat) Mat {
 func (m *Mat) Close() error {
 	C.Mat_Close(m.p)
 	m.p = nil
+	m.d = nil
 	return nil
 }