Fix ShadingPattern issues + eslint

[Trisard]

Bugs fixed

• Patterns was unable to work with all functions who use fillWithPattern.
  I rollback on that but fillWithPattern should take pattern key or pattern object in parameter and not patternData. All datas are already in patterns.
• Shading patterns was not using scaling for its coordinates.
• fillWithPattern function was writing matrix every time for shading patterns but the parameter is optional.

Tested with below code

import { jsPDF } from "../../../ProjetJS/jsPDF/dist/jspdf.node.min.js";

const doc = new jsPDF();

const pattern = doc.ShadingPattern(
    "axial",
    [10, 100, 100, 10],
    [
        { offset: 0, color: [255, 0, 0] },
        { offset: 0.3, color: [255, 255, 0] },
        { offset: 0.5, color: [0, 255, 0] },
        { offset: 0.7, color: [0, 255, 255] },
        { offset: 1, color: [0, 0, 255] }
    ]
);

doc.advancedAPI(doc => {
    doc.addShadingPattern("testPattern", pattern);
});

doc.path([
    { op: "m", c: [10, 10] },
    { op: "l", c: [100, 10] },
    { op: "l", c: [100, 10] },
    { op: "l", c: [100, 100] },
    { op: "l", c: [10, 100] }
]);

doc.fill({key:"testPattern"});

doc.save();

Result