Fixed the missing "=" in options.filter

[Rishi-121]

I have fixed the missing "=" in the options.filter.

Before

const options {
  filter: function ({name, originalFilename, mimetype}) {
    // keep only images
    return mimetype && mimetype.includes("image");
  }
};

After

const options = {
  filter: function ({name, originalFilename, mimetype}) {
    // keep only images
    return mimetype && mimetype.includes("image");
  }
};

[LeonardoDaLuz]

this option doesn't work....

[GrosSacASac]

you need to install from master branch ... #718