[MacPorts] #54905: webkit2-gtk @ 2.14.2_2: update to 2.16.x or 2.18.0

[MacPorts]

#54905: webkit2-gtk @ 2.14.2_2: update to 2.16.x or 2.18.0
-------------------------+-------------------------
 Reporter:  yan12125     |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  webkit2-gtk
-------------------------+-------------------------
 WebKitGTK+ 2.16 introduces a series of *_ephemeral APIs [1][2], which is
 used in a course-material-fetching tool used in my campus [3]. Bumping to
 2.16.x is great, and the latest stable version 2.18.0 is even better.
 Thanks for any further inputs.

 [1]
 https://webkitgtk.org/reference/webkit2gtk/unstable/WebKitWebContext.html

 [2]
 https://webkitgtk.org/reference/webkit2gtk/unstable/WebKitWebsiteDataManager.html

 [3] https://github.com/lantw44/ceiba-dl

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Ticket URL: <https://trac.macports.org/ticket/54905>
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