Update com.github.philip-scott.wallpaperize.appdata.xml

Author: Philip-Scott

data/com.github.philip-scott.wallpaperize.appdata.xml

@@ -15,7 +15,7 @@
     <binary>com.github.philip-scott.wallpaperize</binary>
   </provides>
   <releases>
-    <release version="1.2.7" date="2018-8-23">
+    <release version="1.2.8" date="2019-05-05">
       <description>
         <p>Juno Release</p>
         <ul>