deps: upgrade npm to 6.1.0

PR-URL: https://github.com/nodejs/node/pull/20190
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 0 insertions, 21 deletions

diff --git a/deps/npm/node_modules/update-notifier/node_modules/boxen/node_modules/term-size/node_modules/execa/node_modules/is-stream/index.js b/deps/npm/node_modules/update-notifier/node_modules/boxen/node_modules/term-size/node_modules/execa/node_modules/is-stream/index.js
deleted file mode 100644
index 6f7ec91a40..0000000000
--- a/deps/npm/node_modules/update-notifier/node_modules/boxen/node_modules/term-size/node_modules/execa/node_modules/is-stream/index.js
+++ /dev/null
@@ -1,21 +0,0 @@
-'use strict';
-
-var isStream = module.exports = function (stream) {
-	return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
-};
-
-isStream.writable = function (stream) {
-	return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
-};
-
-isStream.readable = function (stream) {
-	return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
-};
-
-isStream.duplex = function (stream) {
-	return isStream.writable(stream) && isStream.readable(stream);
-};
-
-isStream.transform = function (stream) {
-	return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
-};