Update bower.json
Update bower.json

mergeCells option does not work in <=12.6 hansontable polymer component, but seem to be working in 13.0
handsontable/hot-table,chrisp22/hot-table,AzharWeb/hot-table,MetaMemoryT/hot-table,MetaMemoryT/hot-table,AzharWeb/hot-table,chrisp22/hot-table,handsontable/hot-table