Display relative SVG images in package readme.md

[jaydenseric]

This makes it much easier to manage readme content such as logos as diagrams as they can be versioned in the repo without having to use an external host. Github began supporting this in September 2017.

Link to the page

https://www.npmjs.com/package/apollo-upload-client

Expected behavior

The logo image (which is an SVG with a relative path) should display, like in Github.

Actual behavior

SVG title text displays without the graphic.