libreantdb: substitute deprecated 'string' type
libreantdb: substitute deprecated 'string' type

https://www.elastic.co/guide/en/elasticsearch/reference/5.5/breaking_50_mapping_changes.html

The 'string' type has been deprecated in favor of the 'text' type

insomnia-lab/libreant,insomnia-lab/libreant,insomnia-lab/libreant,insomnia-lab/libreant