maintain order of original data if no search term is provided

[hozefaj]

• match-sorter version: 2.2.0
• node version: v8.9.3
• npm (or yarn) version: npm v5.7.1

Relevant code or config

segments = matchSorter(this.props.segments.list, searchTerm, {
  keys: ['id', 'code', 'description'],
});

What you did:

1. perform a search with proper value of searchTerm
2. empty searchTerm out. matchSorter modifies the order of the response, does not maintain the original order when no search term is entered.

Suggested solution:
I guess checking for value before the actual search and sorting is performed. So if searchTerm is empty just return the input as is.

[kentcdodds]

So you're suggesting this change?

 function matchSorter(items, value, options = {}) {
+   if (!value) {
+     return  items
+   }
   const {keys, threshold = rankings.MATCHES} = options
   const matchedItems = items.reduce(reduceItemsToRanked, [])
   return matchedItems.sort(sortRankedItems).map(({item}) => item)

I think I'm good with that. Want to make a PR?

[hozefaj]

Yeah sure. Will do.