Warning in TemplateExtractor

[loleg]

There's an Java unchecked call warning during the build as follows:

/home/gradle/project/src/main/java/com/proxeus/xml/template/TemplateExtractor.java:123: warning: [unchecked] unchecked call to forEachRemaining(Consumer<? super E>) as a member of the raw type Iterator
        start.getAttributes().forEachRemaining(a -> {
                                              ^
  where E is a type-variable:
    E extends Object declared in interface Iterator

See also #3