Update release date

Author: mominul

data/io.github.openbangla.keyboard.metainfo.xml

@@ -16,7 +16,7 @@
     </p>
   </description>
   <releases>
-  <release version="1.3.0" date="2018-04-15" urgency="medium">
+  <release version="1.3.0" date="2018-04-27" urgency="medium">
       <description>
         <ul>
           <li>