Text vertical display problem

[panpanzhao]

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

2. What steps will reproduce the problem?
   1.Text add -webkit-writing-mode:vertical-rl;
   And - its - text - orientation: upright CSS properties, the browser can display properly, but phantomjs screenshots boone the normal display

3. Which operating system are you using?
   window10

4. Did you use binary PhantomJS or did you compile it from source?
   binary

5. Please provide any additional information below.

[stale]

Due to our very limited maintenance capacity, we need to prioritize our development focus on other tasks. Therefore, this issue will be automatically closed (see #15395 for more details). In the future, if we see the need to attend to this issue again, then it will be reopened. Thank you for your contribution!