[fix] raise processor minimum version to 5.3.0

Author: line-o

expath-pkg.xml.tmpl

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <package xmlns="http://expath.org/ns/pkg" name="http://exist-db.org/apps/public-repo" abbrev="@project.name@" version="@project.version@" spec="1.0">
     <title>eXist-db Public Application Repository</title>
-    <dependency processor="http://exist-db.org" semver-min="5.0.0"/>
+    <dependency processor="http://exist-db.org" semver-min="5.3.0"/>
     <dependency package="http://exist-db.org/xquery/semver-xq" semver-min="2.2.1"/>
     <dependency package="http://exist-db.org/apps/shared" semver-min="0.9.1"/>
     <dependency package="http://exist-db.org/html-templating" semver-min="1.0.2"/>