lib/sc: fix unpack on certain Lua versions

reported by @ariutti and @v1a1l1e1

Author: s-ol

core/registry.moon

@@ -5,8 +5,6 @@
 import Result from require 'core.result'
 import Error from require 'core.error'
 
-unpack or= table.unpack
-
 class Registry
 --- internals for `Tag`
 -- @section internals

lib/midi/launchctl.moon

@@ -2,7 +2,6 @@ import ValueStream, EventStream, Op, Input, val, evt from require 'core.base'
 import apply_range, bit from require 'lib.midi.core'
 import bor, lshift from bit
 
-unpack or= table.unpack
 color = (r, g) -> bit.bor 12, r, (bit.lshift g, 4)
 
 cc_seq = ValueStream.meta

lib/sc.moon

@@ -2,6 +2,8 @@ import Op, ValueStream, Input, val, evt from require 'core.base'
 import pack from require 'osc'
 import dns, udp from require 'socket'
 
+unpack or= table.unpack
+
 play = ValueStream.meta
   meta:
     name: 'play'