Adding missing node modules

node_modules/slash/index.js

@@ -0,0 +1,11 @@
+'use strict';
+module.exports = input => {
+	const isExtendedLengthPath = /^\\\\\?\\/.test(input);
+	const hasNonAscii = /[^\u0000-\u0080]+/.test(input); // eslint-disable-line no-control-regex
+
+	if (isExtendedLengthPath || hasNonAscii) {
+		return input;
+	}
+
+	return input.replace(/\\/g, '/');
+};