chore(deps): update @sentry/browser to v5.12.1

[thi-bot]

This PR contains the following updates:

Package	Update	Type	Change	Sourcegraph
@sentry/browser	minor	devDependencies	5.11.2 -> 5.12.1

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Release Notes

getsentry/sentry-javascript

### [`v5.12.1`](https://togithub.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md#​5121) [Compare Source](https://togithub.com/getsentry/sentry-javascript/compare/5.12.0...5.12.1) - [apm] ref: If `maxTransactionTimeout` = `0` there is no timeout - [apm] fix: Make sure that the `maxTransactionTimeout` is always enforced on transaction events - [browser] fix: Support for Hermes stacktraces ### [`v5.12.0`](https://togithub.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md#​5120) [Compare Source](https://togithub.com/getsentry/sentry-javascript/compare/5.11.2...5.12.0) - [core] feat: Provide `normalizeDepth` option and sensible default for scope methods ([#​2404](https://togithub.com/getsentry/sentry-javascript/issues/2404)) - [browser] fix: Export `EventHint` type ([#​2407](https://togithub.com/getsentry/sentry-javascript/issues/2407))

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