Update dependency solc to v0.5.13

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
solc	devDependencies	patch	0.5.12 -> 0.5.13

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Release Notes

ethereum/solc-js

### [`v0.5.13`](https://togithub.com/ethereum/solc-js/compare/v0.5.12...251e99f8bc05300ef4cf737aef3a92c881b627d7) [Compare Source](https://togithub.com/ethereum/solc-js/compare/v0.5.12...251e99f8bc05300ef4cf737aef3a92c881b627d7)

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