switched the alt_getopt module import to work with newer versions of lua (#289)

Author: ylixir

bin/moon

@@ -1,5 +1,5 @@
 #!/usr/bin/env lua
-require("alt_getopt")
+local alt_getopt = require("alt_getopt")
 local moonscript = require("moonscript.base")
 local util = require("moonscript.util")
 local errors = require("moonscript.errors")

bin/moon.moon

@@ -1,5 +1,5 @@
 
-require "alt_getopt"
+alt_getopt = require "alt_getopt"
 
 moonscript = require "moonscript.base"
 util = require "moonscript.util"

bin/splat.moon

@@ -2,8 +2,8 @@
 
 -- concatenate a collection of lua modules into one
 
-require "lfs"
-require "alt_getopt"
+lfs = require "lfs"
+alt_getopt = require "alt_getopt"
 
 import insert, concat from table
 import dump, split from require "moonscript.util"