Fix for write contract functionality: false and 0 boolean inputs are parsed as true

[vbaranov]

Resolves #3751

Motivation

Write contract functionality: false and 0 boolean inputs are parsed as true

https://discord.com/channels/502416149343109121/502432256011272195/829043557390221372

I believe there's an issue with blockscout where when calling a function that accepts a boolean value, whether I put "true", "false", "1" or "0" it always converts to true. You can see in this screenshot the data created should have 0 at the end for false but it has 1 no matter what I input in the boolean field.

For reference this was the contract: https://blockscout.com/poa/xdai/address/0xfBd0B2726070a9D6AfF6D7216c9E9340Eae68b2a/write-proxy

Changelog

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Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
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• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools