Add svg rendering for error example

[marionebl]

• Add screencast:error run-script
• Replace png error example with static SVG rendering
• Match style of Getting started screencast

[gaearon]

Thanks! How hard would it be to do the test runner with a filtering example?

[marionebl]

Should be doable, what pattern do you have in mind?

[gaearon]

Just "app" maybe

[marionebl]

Like this: https://asciinema.org/a/sew8gwVzQxJR5EKrPM7OyzXGt?

[gaearon]

I think it would look more impressive if there were more tests 😄 Can we use some open source project? e.g. Redux examples use CRA scripts.

Another minor thing is that Jest removed autocomplete in 22 because of some issues. So let's wait until we release 2.x alpha and then we can record the more recent behavior.