Adjust Release Date

Author: JorjMcKie

README.md

@@ -2,7 +2,7 @@
 
 ![logo](https://github.com/rk700/PyMuPDF/blob/master/demo/pymupdf.jpg)
 
-Release date: May 27, 2018
+Release date: June 5, 2018
 
 # Authors
 * [Ruikai Liu](mailto:[email protected])