Fix abort() getting stuck when being passed a reference

[clonejo]

ISSUE 66 - Fix abort() getting stuck when being passed a reference

Fixes #66

Description

• It was possible to pass a reference to data_stream, instead of ownership, which the code intended.
• Require 'static, ie. normal references cannot be passed anymore.
• Could stop old, buggy code from compiling.

Type of change

Please select relevant options.

• 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 not work as expected)
  • not really it only stops previously broken code from compiling
• This change requires a documentation update

Checklist

• My code follows the contribution guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I formatted the code with cargo fmt
• I linted my code using cargo clippy and reports no warnings
• I have added tests that prove my fix is effective or that my feature works
  • the tests still compile
• I have introduced no C-bindings
• I increased or maintained the code coverage for the project, compared to the previous commit

Acceptance tests

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• regression test: ...

[veeso]

Thanks for implementing this!