Bad parsing of arrays of DocumentReferences

[francescopellegrini]

Given an exported data as follows:

const data = {
  collection1: {
    docId: {
      refArray: [
        {path:'collection1/document1-ref'},
        {path:'collection2/document2-ref'}
      ]
    }
  }
}

the refArray field gets parsed into 'collection2/document2-ref instead of an array of strings.

This is because the field is completely overridden while looping on the original array.

https://github.com/dalenguyen/firestore-backup-restore/blob/62385dd250943acf67578698f23168dd2e0286ef/src/export.ts#L82-L84

The appropriate way of mapping the array values can be seen in import.ts:

https://github.com/dalenguyen/firestore-backup-restore/blob/62385dd250943acf67578698f23168dd2e0286ef/src/import.ts#L173