Update dependency chart.js to v2.9.4 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
chart.js (source)	2.9.3 -> 2.9.4

GitHub Vulnerability Alerts

CVE-2020-7746

This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with provided options. However, during this operation, the keys of the object being set are not checked, leading to a prototype pollution.

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Release Notes

chartjs/Chart.js (chart.js)

v2.9.4

Compare Source

This is the last release of v2 and focused on fixing bugs identified in the v2.9.3 release.

Bugs Fixed

• #​7404 - Preserve prototypes when cloning. Thanks @​iddings
• #​7587 - Fix docs for external moment.js. Thanks @​mojoaxel
• #​7853 - Fix box recursion when dimensions are NaN. Thanks @​alessandroasm
• #​7883 - Fix call stack exception when computing label sizes. Thanks @​silentmatt
• #​7918 - Prevent global prototype pollution via the merge helper
• #​7920 - Use Object.create(null) as merge target, to prevent prototype pollution

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