ignoreErrors doesn't include exception type

[benvinegar]

We've been advising users to do the following:

Raven.config('your-dsn', {
  ignoreErrors: [
    /SecurityError/
  ]
}).install();

... but it turns out that ignoreErrors only matches the error message, not a concatenation of type and message, as most users expect.

Relevant code is here. Viewed there, it's kind of obvious.