Scope is not persisted on Windows

[timfish]

Affected versions: >= 0.12.1

Not sure how I missed this before but in both 0.12.1 and 0.13, scope.json is not getting saved in the sentry directory within the app userData directory.

[timfish]

'@sentry/utils/store' .flush() is failing and the error is silently swallowed here.

When running the e2e tests, the ignored error is below and I'm guessing the issue is the leading forward slash:

Error: ENOENT: no such file or directory, mkdir '/C:\Users\tim\AppData\Local\Temp\tmp-cjnzaurx00000xslxs26x5zxe\sentry'  
    at fs.mkdirSync (fs.js:872:3)                                                                                                
    at Object.fs.mkdirSync (ELECTRON_ASAR.js:727:16)                                                                             
    at Object.mkdirpSync (C:\Users\tim\Documents\Repositories\sentry-electron\node_modules\@sentry\utils\fs.js:151:18)           
    at Store.flush (C:\Users\tim\Documents\Repositories\sentry-electron\node_modules\@sentry\utils\store.js:68:12)               
    at Immediate._onImmediate (C:\Users\tim\Documents\Repositories\sentry-electron\node_modules\@sentry\utils\store.js:33:15)    
    at runCallback (timers.js:696:18)                                                                                            
    at tryOnImmediate (timers.js:667:5)                                                                                          
    at processImmediate (timers.js:649:5)                                                                                        
    at process.topLevelDomainCallback (domain.js:121:23)                                                                                                          

I think it was broken by this commit (cc. @kamilogorek) because this is not compatible with Windows.

[timfish]

#140 Added a failing test

[kamilogorek]

Related: getsentry/sentry-javascript#1712

[timfish]

This was fixed in v0.14.0.