Update dependency y18n to 4.0.1 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change
y18n	4.0.0 -> 4.0.1

GitHub Vulnerability Alerts

CVE-2020-7774

Overview

The npm package y18n before versions 3.2.2, 4.0.1, and 5.0.5 is vulnerable to Prototype Pollution.

POC

const y18n = require('y18n')();

y18n.setLocale('__proto__');
y18n.updateLocale({polluted: true});

console.log(polluted); // true

Recommendation

Upgrade to version 3.2.2, 4.0.1, 5.0.5 or later.

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