Update highcharts-ng.js

To be able to configure things like, 
legend: {enabled: false},
tooltip: { formatter: function() {  return .....; } },
  and so on ...

Currently 
-----------
{chart: ..., 
credits: ...
loading: ...
options: 
    legend: { enabled: false}
    tooltip: { formatter: function() { return ...;}},

After change
---------------
{chart: ..., 
credits: ...
loading: ...
legend: { enabled: false}
tooltip: { formatter: function() { return ...;}},