add some android support

add path for Text
add stroke pattern
add text dashed and fix dasharray bug

lib/extract/extractText.js

@@ -82,15 +82,12 @@ const alignments = {
 };
 
 export default function(props) {
-    let textPath = props.path ? new SerializablePath(props.path).toJSON() : null;
-    var textFrame = extractFontAndLines(
-        props,
-        childrenAsString(props.children)
-    );
-
     return {
         alignment: alignments[props.textAnchor] || 0,
-        frame: textFrame,
-        path: textPath
+        frame: extractFontAndLines(
+            props,
+            childrenAsString(props.children)
+        ),
+        path: props.path ? new SerializablePath(props.path).toJSON() : undefined
     }
 }