Do not use the outdated extern crate macro for importing dependencies

[matthiasbeyer]

PR Details

Tackles #72

I am not a Go person and I didn't look into anything else than just where the extern_crate macro is used and replaced it.

This may not work at all. But it is a proposal.

Description

Related Issue

#72

Motivation and Context

Generated outdated Rust is an issue because the output does not compile right after being generated, so the code needs manual or automated cleanup, which is tedious.

How Has This Been Tested

Not at all.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Not sure.

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.