add pop up positioning prop

[srsajjad]

is there any option to select bottom / top / left / right appearing position ? could not find in the instruction

[rauberdaniel]

I was just looking for the same and jumped into the source code to find out: It’s currently hardcoded to the top right corner. https://github.com/minhtranite/react-notifications/blob/master/src/notifications.scss#L17-L18