fix: replace deprecated 'crashed' event

[knownasilya]

Basically 'crashed' is deprecated: https://www.electronjs.org/docs/api/web-contents#event-crashed-deprecated

[RobbieTheWagner]

@knownasilya do you happen to know what version of Electron it was deprecated in? We may want to take a stance on what Electron versions we support too.

[knownasilya]

Well the new event was added here (8.4) https://www.electronjs.org/releases/stable?version=8&page=2#release-notes-for-v840

[knownasilya]

Also looks like deprecated in 8 electron/electron#23096

[bendemboski]

I'm not sure we need to take a version stance because of this. This code is in the blueprint, and the blueprint will always install the latest version of Electron. We've never said that the blueprint-generated code is compatible with past versions of Electron (that would incur a pretty big maintenance cost), so if users go in and customize their Electron version, it's completely reasonable for them to expect to have to update the blueprint-generated code to work with the older version as well.

I suppose we could mention this in the documentation somewhere, but I'm not even sure that's necessary...seems like an edge case that someone would install ember-electron without the intent to use the latest version of Electron.

[knownasilya]

@bendemboski updated