support base version 3
What does this MR do?
This makes it possible to use the ABC interpreter with base 3.0.
As version 4 of the compiler can produce .r annotations, we have to ignore these when generating bytecode.
Changes to public APIs
Author's checklist (required)
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If bugs have been solved, tests have been added (guidelines) -
A changelog entry has been added (guidelines) -
Newly added code is documented (guidelines) -
Newly added code has a style consistent with the rest of the repository -
Intermediate commits compile (use git rebase -i mainif not)