Bump contracts/lib/chainlink from 883c9f9 to 58995a5

Bumps [contracts/lib/chainlink](https://github.com/smartcontractkit/chainlink) from `883c9f9` to `58995a5`.
- [Release notes](https://github.com/smartcontractkit/chainlink/releases)
- [Commits](smartcontractkit/chainlink@883c9f9...58995a5)

---
updated-dependencies:
- dependency-name: contracts/lib/chainlink
  dependency-type: direct:production
...

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