[MacPorts] #59652: update py-language-server to 0.30.0

[MacPorts]

#59652: update py-language-server to 0.30.0
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 Reporter:  pmetzger  |      Owner:  reneeotten
     Type:  update    |     Status:  assigned
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  py-language-server
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 Upstream has updated py-language-server to 0.30.0

 I also note that we don't seem to support python 3.8 yet, not sure if
 that's because upstream doesn't?

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Ticket URL: <https://trac.macports.org/ticket/59652>
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