chore(package): update version to 0.4.3

[mhuggins]

Description

Update version to 0.4.3.

Motivation and Context

Fixes issues with ICO build due to RPC node unavailability.

How Has This Been Tested?

N/A

Screenshots (if appropriate)

N/A

Types of changes

• Chore (tests, refactors, and fixes)
• New feature (adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING guidelines and confirm that my code follows the code style of this project.
• Tests for the changes have been added (for bug fixes/features)

Documentation

• Docs need to be added/updated (for bug fixes/features)

Closing issues

N/A