Create Truncater with context. So it will actually truncate string in its initializer

Author: yury

AsyncDisplayKit/TextKit/ASTextKitRenderer.mm

@@ -88,6 +88,8 @@ - (ASTextKitContext *)context
                                                    exclusionPaths:attributes.exclusionPaths
                                                   constrainedSize:shadowConstrainedSize
                                              layoutManagerFactory:attributes.layoutManagerFactory];
+
+    [self truncater];
   }
   return _context;
 }