Can't generate correct highchart with useHTML enabled option.

[RredCat]

1. Which version of PhantomJS are you using? Tip: run phantomjs --version.
   I am using 2.1.1 version of phantomjs

2. What steps will reproduce the problem?

• start phantomjs server phantomjs highcharts-convert.js -host 127.0.0.1 -port 3003
• call it with next infile parameter - "{'chart':{'type':'bar'},'xAxis':{'categories':['&#39;<b>Jan</b>&#39;', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],'labels':{'useHTML':true}},'series':[{'data':[29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]}]}"
• I recieved image without any categorties.
• If I take off 'labels':{'useHTML':true} I have correct chart but my html category looks bad (&#39;<b>Jan</b>&#39; instead of 'Jan').
• Web version of highchart doesn't have this issue http://jsfiddle.net/RredCat/v90pv006/ and works correct.

3. Which operating system are you using?
   I am using Windows 10.

4. Did you use binary PhantomJS or did you compile it from source?
   I am using downloaded binary of PhantomJS

5. Please provide any additional information below.