C++ style enums 13/N: Wrap (#1400)

Summary:
X-link: https://github.com/facebook/react-native/pull/39539

Pull Request resolved: https://github.com/facebook/yoga/pull/1400

Moves internal usages of YGPositionType to PositionType

bypass-github-export-checks

Changelog: [Internal]

Reviewed By: rshest

Differential Revision: D49361746

fbshipit-source-id: ccc77b4c77753b5f41e11f1849d4c02153c190b7

yoga/debug/NodeToString.cpp

@@ -166,8 +166,7 @@ void nodeToString(
     appendFloatOptionalIfDefined(str, "flex", style.flex());
 
     if (style.flexWrap() != yoga::Node{}.getStyle().flexWrap()) {
-      appendFormattedString(
-          str, "flex-wrap: %s; ", YGWrapToString(style.flexWrap()));
+      appendFormattedString(str, "flex-wrap: %s; ", toString(style.flexWrap()));
     }
 
     if (style.overflow() != yoga::Node{}.getStyle().overflow()) {