missing py.typed and errors in typing

[t1user]

The package requires a py.typed marker.

After generating stubs with stubgen, mypy reports following errors:

stubs/eventkit/ops/timing.pyi:9: error: Signature of "on_source_error" incompatible with supertype "Op"  [override]
stubs/eventkit/ops/timing.pyi:9: note:      Superclass:
stubs/eventkit/ops/timing.pyi:9: note:          def on_source_error(self, source: Any, error: Any) -> None
stubs/eventkit/ops/timing.pyi:9: note:      Subclass:
stubs/eventkit/ops/timing.pyi:9: note:          def on_source_error(self, error: Any) -> None
stubs/eventkit/ops/misc.pyi:10: error: Signature of "on_source_error" incompatible with supertype "Op"  [override]
stubs/eventkit/ops/misc.pyi:10: note:      Superclass:
stubs/eventkit/ops/misc.pyi:10: note:          def on_source_error(self, source: Any, error: Any) -> None
stubs/eventkit/ops/misc.pyi:10: note:      Subclass:
stubs/eventkit/ops/misc.pyi:10: note:          def on_source_error(self, error: Any) -> None
stubs/eventkit/ops/array.pyi:8: error: Return type "ArrayMin" of "min" incompatible with return type "Min" in supertype "Event"  [override]
stubs/eventkit/ops/array.pyi:9: error: Return type "ArrayMax" of "max" incompatible with return type "Max" in supertype "Event"  [override]
stubs/eventkit/ops/array.pyi:10: error: Signature of "sum" incompatible with supertype "Event"  [override]
stubs/eventkit/ops/array.pyi:10: note:      Superclass:
stubs/eventkit/ops/array.pyi:10: note:          def sum(self, start: int = ...) -> Sum
stubs/eventkit/ops/array.pyi:10: note:      Subclass:
stubs/eventkit/ops/array.pyi:10: note:          def sum(self) -> ArraySum
stubs/eventkit/ops/array.pyi:12: error: Return type "ArrayMean" of "mean" incompatible with return type "Mean" in supertype "Event"  [override]
stubs/eventkit/ops/array.pyi:14: error: Return type "ArrayAny" of "any" incompatible with return type "eventkit.ops.aggregate.Any" in supertype "Event"  [override]
stubs/eventkit/ops/array.pyi:15: error: Return type "ArrayAll" of "all" incompatible with return type "All" in supertype "Event"  [override]
Found 8 errors in 3 files (checked 14 source files)