[Bug] Exported Keys of a DocumentIndex have improper format

[samuelnunoo]

Issue

Exported Keys of a DocumentIndex have improper format.
This can be reproduced by create a nested document index, exporting the keys. When you try to reimport the keys you'll see that they'll have the format "field1-field2..." instead of "field1:field2" which leads to an undefined error.

After messing around with different key formats I found that this works

//Note result is the exported index data
    const newIndex = new Document(config)

    for (const r in result) {

     
        let string = r.replace("-",":")
        console.log(string)
        newIndex.import(string,result[r]) //
      
    }

    newIndex.search("Whales") 

[ts-thomas]

This is now fixed in v0.7.23
Further improvements to provide Promise.all() compatible export ist coming in next version.