chore(release): 7.2.1 [skip ci]

## [7.2.1](https://github.com/harttle/liquidjs/compare/v7.2.0...v7.2.1) (2019-02-22)

### Bug Fixes

* default length for truncate and truncatewords ([56c7992](https://github.com/harttle/liquidjs/commit/56c7992))

dist/fs/ifs.d.ts

@@ -1,5 +1,5 @@
 export default interface IFS {
-    exists: (filepath?: string) => Promise<boolean>;
+    exists: (filepath: string) => Promise<boolean>;
     readFile: (filepath: string) => Promise<string>;
     resolve: (root: string, file: string, ext: string) => string;
 }