Merge pull request #12286 from DefinitelyTyped/feat-content-type

export types of content-type

content-type/content-type-tests.ts

@@ -15,3 +15,5 @@ obj = contentType.parse(res);
 
 var str: string = contentType.format({type: 'image/svg+xml'});
 
+var media: contentType.MediaType;
+contentType.format(media);

content-type/index.d.ts

@@ -3,10 +3,10 @@
 // Definitions by: Hiroki Horiuchi <https://github.com/horiuchi>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-declare var x: ContentType.StaticFunctions;
-export = x;
+declare var ct: ct.StaticFunctions;
+export = ct;
 
-declare namespace ContentType {
+declare namespace ct {
     interface StaticFunctions {
         parse(string: string): MediaType;
         parse(req: { headers: any; }): MediaType;