Update go-serial to build for darwin #103
Description
Due to stricter enforcement of rules in Go 1.21, go-serial version < 1.6.0 does not build on darwin.
So for our applications to be supported on darwin for Go 1.21, go-serial needs to be updated to at > 1.6.0, see release notes here.
# go.bug.st/serial/enumerator
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:142:11: cannot define new methods on non-local type C.CFStringRef
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:148:11: cannot define new methods on non-local type C.CFTypeRef
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:154:11: cannot define new methods on non-local type *C.io_registry_entry_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:165:11: cannot define new methods on non-local type *C.io_registry_entry_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:175:11: cannot define new methods on non-local type *C.io_registry_entry_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:194:11: cannot define new methods on non-local type *C.io_registry_entry_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:214:11: cannot define new methods on non-local type *C.io_iterator_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:218:11: cannot define new methods on non-local type *C.io_iterator_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:222:11: cannot define new methods on non-local type *C.io_iterator_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:229:11: cannot define new methods on non-local type *C.io_object_t
../../../go/pkg/mod/go.bug.st/serial@v1.5.0/enumerator/usb_darwin.go:233:11: cannot define new methods on non-local type *C.io_object_t