Add Config::setPointScaleFactor to JavaScript binding

Summary:
Needed for a project I'm working on to properly render on high dpi screens. I've manually tested against my project to confirm it works.
Closes https://github.com/facebook/yoga/pull/612

Differential Revision: D6413517

Pulled By: emilsjolander

fbshipit-source-id: c298d7f6b58dc45aaaede2bb995df8615911a4a9

javascript/sources/Config.cc

@@ -36,6 +36,11 @@ void Config::setExperimentalFeatureEnabled(int feature, bool enabled)
     YGConfigSetExperimentalFeatureEnabled(m_config, static_cast<YGExperimentalFeature>(feature), enabled);
 }
 
+void Config::setPointScaleFactor(float pixelsInPoint)
+{
+    YGConfigSetPointScaleFactor(m_config, pixelsInPoint);
+}
+
 bool Config::isExperimentalFeatureEnabled(int feature) const
 {
     return YGConfigIsExperimentalFeatureEnabled(m_config, static_cast<YGExperimentalFeature>(feature));

javascript/sources/Config.hh

@@ -40,6 +40,7 @@ class Config {
  public: // Setters
 
     void setExperimentalFeatureEnabled(int feature, bool enabled);
+    void setPointScaleFactor(float pixelsInPoint);
  
  public: // Getters
 

javascript/sources/nbind.cc

@@ -47,6 +47,7 @@ NBIND_CLASS(Config)
     method(destroy);
 
     method(setExperimentalFeatureEnabled);
+    method(setPointScaleFactor);
 
     method(isExperimentalFeatureEnabled);
 }