[MacPorts] #40421: lua @5.2.2 Lua 5.1 should not be auto-upgraded to 5.2

[MacPorts]

#40421: lua @5.2.2 Lua 5.1 should not be auto-upgraded to 5.2
------------------------+--------------------------------
 Reporter:  agladysh@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.2.0
 Keywords:              |       Port:  lua
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 Lua 5.2 is a different version of Lua language, not (fully) compatible
 with 5.1. Lua 5.2 is not widely supported (yet) by existing Lua modules.

 It should be possible to user to have Both versions of Lua, 5.1 and 5.2
 installed on the same machine.

 Auto-upgrade from 5.1 to 5.2 has a good chance of breaking things up —
 which happened on my box. Please disable this.

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Ticket URL: <https://trac.macports.org/ticket/40421>
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