[MacPorts] #54175: vtk: Add python36 variant

[MacPorts]

#54175: vtk: Add python36 variant
--------------------------+----------------------
  Reporter:  mf2k         |      Owner:  stromnov
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:
      Port:  vtk          |
--------------------------+----------------------
Changes (by mf2k):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 Was done in https://github.com/macports/macports-
 ports/commit/018c6692d2e352f1d13b18f88f2da0539c1abf62.

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Ticket URL: <https://trac.macports.org/ticket/54175#comment:1>
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