Update dependency reflex-core to v2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
reflex-core	==2.0.0 -> ==2.1.0

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Release Notes

pangolock/reflex-core

### [`v2.1.0`](https://togithub.com/pangolock/reflex-core/releases/v2.1.0) [Compare Source](https://togithub.com/pangolock/reflex-core/compare/v2.0.0...v2.1.0) ##### Update - Extract functions into separate utilities module ([#​51](https://togithub.com/pangolock/reflex-core/issues/51)) ([bb7fc9b](https://togithub.com/reflexivesecurity/reflex-core/commit/bb7fc9b2b34c0b68fd5979e008dcdbd6e6d90a03)), closes [#​51](https://togithub.com/reflexivesecurity/reflex-core/issues/51)

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