Release 2.6.18

Major:
-SharePoint commands library update.

Add:
-New command 'Get lists by site id': returns a list with the editable columns of a list within a SharePoint site.

Fix:
-'List groups' command: a field has been added to filter the response.
-'Get Site' command: Access by hostname and path has been added. The command has also been modified to work due to changes in the library.
-'Get list columns command: Modified due to changes in the library.
-'List items' command: Hostname and path to the site have been added. + Modifications due to changes in the library.
-'Get item' command: Hostname and path to the site have been added. + Changes due to changes in the library.
-'Delete item' command: Changes in the library.
-'Update item' command: Changes in the library.
-'Get Document Libraries' command: Hostname and path to the site have been added.
-'Get documents' command: Hostname and path to the site have been added. The output is changed to be a valid JSON, and two fields are added for filters: 'Contains': to obtain only the documents that contain this text in their name; and 'Start from': to indicate the path within the library from where to start obtaining the documents.