Support pure functional components

Author: jesusgn90

lib/process.js

@@ -107,9 +107,12 @@ module.exports = function(src, filename, config) {
   )
 
   const isFunctional =
-    descriptor.template &&
+    (descriptor.template &&
     descriptor.template.attrs &&
-    descriptor.template.attrs.functional
+    descriptor.template.attrs.functional) ||
+    (descriptor.script &&
+     descriptor.script.content && 
+     /functional:\s*true/.test(descriptor.script.content))
 
   const templateStart = descriptor.template && descriptor.template.start
   const templateLine = src.slice(0, templateStart).split(splitRE).length