Add matcher type to export

This fixes amzn#875

types/index.d.ts

@@ -22,6 +22,7 @@ import {FileHeader as _FileHeader} from './FileHeader';
 import {Filter as _Filter} from './Filter';
 import {Format as _Format, Formatter as _Formatter } from './Format';
 import {FormatHelpers as _FormatHelpers} from './FormatHelpers';
+import {Matcher as _Matcher} from './Matcher.d.ts':
 import {Options as _Options} from './Options';
 import {Parser as _Parser} from './Parser';
 import {Platform as _Platform} from './Platform';
@@ -45,6 +46,7 @@ declare namespace StyleDictionary {
   type Format = _Format;
   type FormatHelpers = _FormatHelpers;
   type Formatter = _Formatter;
+  type Matcher = _Matcher;
   type Options = _Options;
   type Parser = _Parser;
   type Platform = _Platform;