🐛 Fix query methods throwing NoMethodErrors.

Unless statements are weird. I haven't been able to find sources to provide that document this, but from some testing it appears that || and && function *differently* in unless statements than if statements. 'unless false || true' and 'unless true || false' will not execute, but 'unless true && false' or 'unless false && true' will. I decided to simply break the break statement into two, because it is much more readable than 'break unless use_continuation && result.key?('continue')'. Many style guides support this, probably for both reasons I provided. cc @xbony2

lib/mediawiki/butt.rb

@@ -79,7 +79,8 @@ def query(params, base_return = [])
       loop do
         result = post(params)
         yield(base_return, result['query']) if result.key?('query')
-        break unless @use_continuation || result.key?('continue')
+        break unless @use_continuation
+        break unless result.key?('continue')
         continue = result['continue']
         continue.each do |key, val|
           params[key.to_sym] = val