Update mypy-dev to 1.14.0a2

[cdce8p]

Proposed change

https://github.com/cdce8p/mypy-dev/releases/tag/1.14.0a2 Compare: https://github.com/python/mypy/compare/946c1bf424f0102e36156efe5f8149cf5d37c4a4...05a9e79068a5830e57264390c9f6bca859e92053

• Typeshed updates
• Minor speed improvements
• Initial support for new syntax TypeVar defaults (requires 3.13) https://github.com/python/mypy/pull/17985
• Improve for loop index variable type narrowing. Resolves some false-positives when accessing TypedDicts with loop index vars. https://github.com/python/mypy/pull/18014

  
  class X(TypedDict):
  hourly: int
  daily: int

def func(x: X) -> None: for var in ("hourly", "daily"): print(x[var])

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