Don't try/catch errors when globalstate.disableErrorBoundaries is on.

[NaridaL]

Fixes #1241

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PR checklist:

• Added unit tests Not sure if testable: As default behavior is to rethrow the exception, different behavior is only noticeable when debugging.
• Updated changelog
• Updated docs (either in the description of this PR as markdown, or as separate PR on the gh-pages branch. Please refer to this PR). For new functionality, at least API.md should be updated
• Added typescript typings N/A
• Verified that there is no significant performance drop (npm run perf)

'PERSIST' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] perf: `npm run small-build && PERSIST=true time node --expose-gc test/perf/index.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] perf script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

[NaridaL]

I'm getting the same errors on master, I don't the think the failing build is from my changes...

[NaridaL]

@mweststrate any feedback?

[mweststrate]

@NaridaL sorry for the late response! But I think this is a useful feature and I will merge it into the Mobx 4 branch :)

[mweststrate]

Merged, thanks!