LiquidErrors not exported

[noctarius]

Hey folks!

Thanks for the great template engine. However, I wonder if there's a reason, why LiquidErrors isn't exported as a type, but the other errors types are. I assume, it's just an oversight.

https://github.com/harttle/liquidjs/blob/350f95c8f7f5fc8c9035589d41c71108627d3db7/src/index.ts#L4

[harttle]

Investigated and turns out to be not easy be fully typed here, depends on #832 thus moved this issue to v11.