fix: Make internal Sentry flags non-enumerable in fill util

[kamilogorek]

Fixes #1849

[getsentry-bot]

Fails

🚫

TSLint failed: @sentry/browser ERROR: /home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts[121, 5]: The key 'enumerable' is not sorted alphabetically ERROR: /home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts[129, 7]: The key 'enumerable' is not sorted alphabetically ERROR: /home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts[133, 7]: The key 'enumerable' is not sorted alphabetically

	Warnings
⚠️	Please add a changelog entry for your changes.

	Messages
📖	@sentry/browser gzip'ed minified size: 21.916 kB

Generated by 🚫 dangerJS

[atk]

You have 2 more places in which you should probably change that.

[kamilogorek]

@atk can you point them out?

[atk]

https://github.com/getsentry/sentry-javascript/blob/master/packages/browser/src/integrations/helpers.ts#L117

The other one seems to be taken over by fill in your current code base, because I didn't find it anymore (Ionly had your transpiled code to work with).

Sorry it took a bit longer, had to get my kids to sleep.

[kamilogorek]

My ack match pattern failed me again :< Thanks @atk! Updated remaining flags.

[atk]

The failure in your build job is the tslint part:

@sentry/browser: $ tslint --format json -p . | tee lint-results.json
@sentry/browser: [{"endPosition":{"character":14,"line":120,"position":3494},"failure":"The key 'enumerable' is not sorted alphabetically","name":"/home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts","ruleName":"object-literal-sort-keys","ruleSeverity":"ERROR","startPosition":{"character":4,"line":120,"position":3484}},{"endPosition":{"character":16,"line":128,"position":3740},"failure":"The key 'enumerable' is not sorted alphabetically","name":"/home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts","ruleName":"object-literal-sort-keys","ruleSeverity":"ERROR","startPosition":{"character":6,"line":128,"position":3730}},{"endPosition":{"character":16,"line":132,"position":3815},"failure":"The key 'enumerable' is not sorted alphabetically","name":"/home/travis/build/getsentry/sentry-javascript/packages/browser/src/integrations/helpers.ts","ruleName":"object-literal-sort-keys","ruleSeverity":"ERROR","startPosition":{"character":6,"line":132,"position":3805}}]