Flake8-builtins

------------------

- Add ``python3.8`` support.
[sobolevn]

- Add ``AnnAssign`` support.
[soboelvn]

- Add ``NamedExpr`` or ``:=`` support.
[sobolevn]

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- Fix tuple parsing.
[memery-imb]

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- Fix regression in 1.4.0 and interaction with flake8-bugbear.
[dirk-thomas]

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- Make code more robust by not assuming that a node is an ``ast.Name``
but actually checking it.
[gforcada]

- Handle ``ast.Starred`` as well (i.e. ``a, *int = range(4)``)
[gforcada]

- Handle lists as well, i.e. ``[a, int] = 3, 4``
[gforcada]

------------------

- Fix TypeError.
Fixes https://github.com/gforcada/flake8-builtins/issues/30
[gforcada]

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- Report different error codes for function (A001) or method definitions (A003).
Fixes https://github.com/gforcada/flake8-builtins/issues/22#issuecomment-378720168
[gforcada]

- Ignore underscore variables, django adds it on the list of builtins on its own.
Fixes https://github.com/gforcada/flake8-builtins/issues/25
[gforcada]