Add your first token - distinct

[shenruisi]

Please try to add the token distinct, function description is below.

SYNOPSIS
- distinct: { path: , value: }

DESCRIPTION
Distinct the values in the list

ATTRIBUTES

name	type	required
path	path	√
value	expr	√

EXAMPLE
Input: [1,1,2,2,3]
Output: [1,2,3]

- distinct: { path: '/distinct', value: '$/someInputArr' }