pandas to_datetime does not accept origin=Timestamp argument

[Dr-Irv]

Environment data

• Language Server version: 2020.9.6
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): Anaconda Python 3.7.5

Expected behaviour

No error

Actual behaviour

print(pd.to_datetime([1, 2, 3], unit="D", origin=pd.Timestamp("1960-01-01")))

reports (once the fix suggested from #427 is applied):

Argument of type "Timestamp" cannot be assigned to parameter "origin" of type "str" in function "to_datetime"
  "Timestamp" is incompatible with "str"

Fix is:

diff core/tools/datetimes.pyi.ORIG core/tools/datetimes.pyi
4a5
> from pandas._libs.tslibs import Timestamp
12c13
< def to_datetime(arg, errors: str = ..., dayfirst: bool = ..., yearfirst: bool = ..., utc = ..., format = ..., exact: bool = ..., unit = ..., infer_datetime_format: bool = ..., origin: str = ..., cache: bool = ...): ...
---
> def to_datetime(arg, errors: str = ..., dayfirst: bool = ..., yearfirst: bool = ..., utc = ..., format = ..., exact: bool = ..., unit = ..., infer_datetime_format: bool = ..., origin: Union[str, Timestamp] = ..., cache: bool = ...): ...

[jakebailey]

This issue has been fixed in version 2020.10.0, which we've just released. You can find the changelog here: https://github.com/microsoft/pylance-release/blob/master/CHANGELOG.md#2020100-7-october-2020