Update pyflakes to 4.0.1 - #463

- Fix for ``lazy`` imports inside ``try:`` (not at module scope)

- Add support for python 3.15
- Drop support for EOL python 3.9
- Add new errors for ``lazy`` imports:
 - lazy import is eagerly used at module scope
 - ``lazy from ... import *`` is invalid syntax
 - ``lazy from __future__ import ...`` is invalid syntax
 - lazy import must be at module scope
- Improve typing specialization:
 - Handle ``cast(...)`` with named arguments
 - Fix duplicate errors in first argument of ``cast(...)``
 - Handle ``TypeVar(... default='...')``
 - Fix missing error for first argument of ``TypeVar(...)`` call
 - Update handling of ``NamedTuple(...)`` for python 3.15 changes
 - Update handling of ``TypedDict(...)`` for python 3.13 changes
 - Add handling of ``assert_type(...)``
 - Add handling of ``NewType(...)``
 - Add handling of ``TypeVarTuple(...)``
 - Add handling of ``ParamSpec(...)``
- Fix assignment expressions in dictionary literals
- Remove ``file_tokens`` parameter to ``Checker``.  Unused since 3.0.0
- Fix false-negative for deleting special variables such as ``del __tracebackhide__``
- Add support for ``python3t`` shebangs
- Remove support for obsolete ``python3m`` and ``pythonu`` shebangs

- Add support for python 3.14
- Add "t-string is missing placeholders" error
- Fix annotation erroneously causing a name to be defined with
``from __future__ import annotations``
- Add support for always-deferred annotations (PEP 749)

- Fix crash with ``global`` / ``nonlocal`` in class bodies (regressed in 3.3.0)

- Allow assignment expressions to redefine annotations (regressed in 3.3.0)

- Add ``__debuggerskip__`` as a special local
- Allow assignment expressions to redefine outer names
- Drop support for EOL python 3.8
- Add new error for unused ``global`` / ``nonlocal`` names

- Add support for ``*T`` (TypeVarTuple) and ``**P`` (ParamSpec) in PEP 695
annotations.

- Drop support for EOL python 3.6 / 3.7
- Remove ``ContinueInFinally`` check (only relevant in python < 3.8)
- Fix forward annotations inside a nested scope
- Produce an error when a definition shadows an unused variable
- Fix accessed global annotation being redefined in a local scope
- Allow redefinition of functions across ``match`` arms
- Fix potential ``None`` for ``lineno`` during tokenization errors
- Add support for PEP 695 and python 3.12

- Fix crash on augmented assign to ``print`` builtin

- Detect undefined name in variable defined by an annotated assignment
- Add a new error for names which are annotated but unused
- Remove handling of python 2.x `` type:`` comments.  Use annotations instead

- Drop support for EOL python 2.7 / 3.4 / 3.5
- Ignore ``__all__`` when not directly assigned
- Handle ``TypeAlias`` annotations as aliases (PEP 613)
- Assignment expressions (``:=``) target outer scope in comprehensions
- Add support for new python 3.11 syntax
- Unify output so it is always ``filename:lineno:col:  message``
- Properly report ``SyntaxError`` from stdin in python < 3.9
- Fix offsets of ``SyntaxError``s in pypy