Update bower-asset/chartjs library from 2.7.* to ~4.0

Problem/Motivation

The 2.7.* is old branch the 4.x branch was out for quite some time.
https://asset-packagist.org/package/bower-asset/chartjs

The chartjs 2.x branch is not supported.

Proposed resolution

• Change bower-asset/chartjs to ~4.0 in the composer.josn file.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-9.0.12

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3346247 by n.ghunaim: Updated bower-asset/chartjs library from 2.7.* to ~4.0