Vector graphics fill attribute doesn't work with pascal cased CSS color names

[akarshpandey217]

Bug Report

Description of the problem

Vector graphics fill attribute doesn't work with pascal cased CSS color names.
.fillAndStroke("Red", "#900")-- outputs black element
.fillAndStroke("red", "#900")-- works fine

CSS names can be case insensitive

Code sample

https://replit.com/@akarshpandey217/minimal-pdfkit#index.js

Your environment

• pdfkit version: 0.12..1
• Node version: 16.2.0
• Browser version (if applicable):
• Operating System: Windows

[PewDieRes]

Opened a fix for this: #1780 — root cause was _normalizeColor doing a case-sensitive lookup against the (lowercase-keyed) namedColors table.