"search" functionality

[mirabel-koso]

Being able to search keywords on the table. Just like the other react-bootstrap-table where you only need to add "search" in the BootstrapTable component.

[chunming-c]

Hi @andela-mekwenugo:

This is the roadmap for the upcoming feature but it was a little delayed. We will implement the search ASAP. Thanks.

[AllenFang]

duplicated with #239

[AllenFang]

Implement on react-bootstrap-table-next@1.0.0 and react-bootstrap-table2-toolkit@1.0.0

https://react-bootstrap-table.github.io/react-bootstrap-table2/docs/basic-search.html