Bug: Missing context in signature checks

[mmv08]

isMessageSigned/isMessageHashSigned would fail because signature check functions we're missing context (this was undefined)

This PR fixes it by:

• binding the execution context
• adding a test

[changeset-bot]

🦋 Changeset detected

Latest commit: 71fd1be

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@gnosis.pm/safe-apps-sdk	Patch
@gnosis.pm/safe-apps-provider	Patch
@gnosis.pm/safe-apps-react-sdk	Patch
@gnosis.pm/safe-apps-web3-react	Patch
@gnosis.pm/safe-apps-web3modal	Patch

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[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	6	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}