ValueNodes are not validating correctly.

[pereman2]

Nodes are being assigned wrong types. The following code shows that a list is assigned to a int, bool and str type which shouldn't happen.

@dataclass
class A:
    a: int = 5 
    b: bool = True
    c: str = "var"


cfg = OmegaConf.structured(A)
# Should raise error
cfg.a = [1, 2]
cfg.b = [1, 2]
cfg.c = [1, 2]