fix(svg parser): Ensure that applyViewboxTransform returns an object and not undefined/null

[rockerBOO]

In fabric.parseSVGDocument, the options object was being set as undefined/null and causing options.crossOrigin to be invalid.

    TypeError: Cannot set property 'crossOrigin' of undefined

      19 | ): Promise<EcogardenFabricObject> =>
      20 |  new Promise((resolve) => {
    > 21 |      fabric.loadSVGFromString(
         |             ^

      at Object.<anonymous>.fabric.parseSVGDocument (node_modules/fabric/dist/fabric.js:4614:25)
      at Object.loadSVGFromString (node_modules/fabric/dist/fabric.js:4992:14)
      at src/js/lib/fabric.ts:21:10

    var svgUid =  fabric.Object.__uid++, i, len,
        options = applyViewboxTransform(doc),
        descendants = fabric.util.toArray(doc.getElementsByTagName('*'));
    options.crossOrigin = parsingOptions && parsingOptions.crossOrigin;

This pull request resolves applyViewboxTransform to always return an object.

Using fabricjs 4.4.0 and this was not erroring previously in 3.6.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[asturur]

@rockerBOO can you remove the build dist file with the master one? so i can merge.
(i usually do git checkout master dist before committing)

[rockerBOO]

Reverted dist/fabric.js to master. Thank you!