jsondiffpatch.dateReviver not present in typescript types

[jakubzloczewski]

Hi, I'm using Typescript in my project and after installation (yarn install jsondiffpatch) I found that index.d.ts is present but dateReviver type is not present.

My workaround is to use this notation: jsondiffpatch['dateReviver']

[Methuselah96]

Fixed in #345.