change operator lighter to lighten

src/CanvasRenderingContext2d.cc

@@ -737,7 +737,7 @@ NAN_GETTER(Context2d::GetGlobalCompositeOperation) {
     // Non-standard
     // supported by resent versions of cairo
 #if CAIRO_VERSION_MINOR >= 10
-    case CAIRO_OPERATOR_LIGHTEN: op = "lighter"; break;
+    case CAIRO_OPERATOR_LIGHTEN: op = "lighten"; break;
     case CAIRO_OPERATOR_DARKEN: op = "darker"; break;
     case CAIRO_OPERATOR_MULTIPLY: op = "multiply"; break;
     case CAIRO_OPERATOR_SCREEN: op = "screen"; break;
@@ -833,7 +833,7 @@ NAN_SETTER(Context2d::SetGlobalCompositeOperation) {
   // Non-standard
   // supported by resent versions of cairo
 #if CAIRO_VERSION_MINOR >= 10
-  } else if (0 == strcmp("lighter", *type)) {
+  } else if (0 == strcmp("lighten", *type)) {
     cairo_set_operator(ctx, CAIRO_OPERATOR_LIGHTEN);
   } else if (0 == strcmp("darker", *type)) {
     cairo_set_operator(ctx, CAIRO_OPERATOR_DARKEN);