Typo in src/scripts/docker-image.js for sha256

[PhracturedBlue]

I was browsing the code, and I noticed this which is likely a typo:
File: src/scripts/docker-image.js

    this.on('get-sha256', function () {
      if (this.size !== undefined) {
        return this.trigger('sha256', this.sha256);
      }
      return this.fillInfo();
    });

I assume that size here should be sha256. It is unlikely to cause an issue since I don't think sha256 can be det without a size, but I thought I'd mention it.

[Joxit]

Hi, thank you for using my project and taking time to review my code.

This should be fixed in 2.0.8 😄