Added changelog for version 1.5.0.

Author: jlesage

appdefs.xml

@@ -90,6 +90,13 @@ For more details about port forwarding, see the following links:
     </documentation>
     <!-- Changelog of the application. -->
     <history>
+      <release>
+        <version>1.5.0</version>
+        <date>2019-05-09</date>
+        <change>Upgraded Nginx Proxy Manager to version 2.0.13.</change>
+        <change>Now using baseimage v2.4.2, which brings the following changes:</change>
+        <change level="2">Updated installed packages to get latest security fixes.</change>
+      </release>
       <release>
         <version>1.4.2</version>
         <date>2019-04-18</date>