Add named export toast

[silverwind]

I'm having some issues with the types on the default toast export not working and I think having a named export would resolve it for me, so this adds it.

As for the actual reason why that type is not working, I have no idea, here are my compilerOptions.

[silverwind]

Meanwhile I have switched to createToast which does not have these type issues for me, being a named export, so I don't strictly need this anymore.

[almond-bongbong]

@silverwind Thank you for adding the named export! This change will greatly help me in resolving the type issues related to the default export. Also, your solution using createToast is very insightful.

I appreciate your valuable contribution and look forward to more in the future!

[silverwind]

Yeah, I definitely prefer named exports because they work reliably as opposed to default exports. Could even go further and deprecate/remove the default export in a major version.