Minidump upload broken via electron-fetch breaking change

[timfish]

[email protected] has a commonjs default export

For [email protected] maybe they changed their build as now the fetch function is a default named export.

This means when installing sentry-electron and electron-fetch resolves to 1.2.x, you will get the following error when trying to upload minidumps:

TypeError: fetch is not a function
    at MinidumpUploader.<anonymous> (\node_modules\@sentry\electron\dist\main\uploader.js:67:40)
    at Generator.next (<anonymous>)
    at \node_modules\@sentry\electron\dist\main\uploader.js:7:71
    at new Promise (<anonymous>)

I've temporarily fixed this in our project by yarn add [email protected]