Go mod and vendor changes

vendor/github.com/mattn/go-isatty/isatty_android.go

@@ -15,3 +15,9 @@ func IsTerminal(fd uintptr) bool {
 	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 	return err == 0
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_others.go

@@ -1,4 +1,4 @@
-// +build appengine js
+// +build appengine js nacl
 
 package isatty
 

vendor/github.com/mattn/go-isatty/isatty_tcgets.go

@@ -1,4 +1,4 @@
-// +build linux
+// +build linux aix
 // +build !appengine
 // +build !android