Feature request for encoding more than one pair of texts
# 🚀 Feature request

Currently, tokenizer may take only inputs like [['text_0', 'text_1']], would be beneficially to expand is as
[['text_0', 'text_1', ..., 'text_n']]

## Motivation

This would open a convenient way to deal with a new set of processing tasks.

## Your contribution

Don't have any.