Pass decoder options to the underlying decoder when reading from files and buffers, not just URLs

[DefiantCatgirl]

What's Changing and Why

This should fix #1356

This ensures that decoder options are passed regardless of where Jimp reads an image from. Right now, the options are only passed if Jimp reads an image from a URL, but not when it reads it from a file or from a buffer.

Without this, it is sometimes impossible to read large JPEG files (~8k resolution) from files or buffers, as reading a large JPEG can fail with a memory allocation error unless a high enough maxMemoryUsageInMB value is passed to the js-jpeg decoder (by default its memory usage is limited to only 512 MB).

What else might be affected

Hopefully nothing.

Tasks

• Add tests
• Update Documentation
• Update jimp.d.ts
• Add SemVer Label