Update dependency mythx-models to v1.9.3

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
mythx-models	patch	==1.9.1 -> ==1.9.3

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Release Notes

dmuhs/mythx-models

### [`v1.9.3`](https://togithub.com/dmuhs/mythx-models/compare/v1.9.1...v1.9.3) [Compare Source](https://togithub.com/dmuhs/mythx-models/compare/v1.9.1...v1.9.3)

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