Fix the result of math.random is inconsistent with Lua standard library.

[wmltogether]

Reference: https://www.lua.org/pil/18.html

The math.random function of the Lua standard library is different from the System.Random in C#.

Example: https://onecompiler.com/lua/43654vze4

local num = math.random()
  print ("math.random: no args: " .. num)

local num = math.random(4)
  print ("math.random: 1 args: " .. num)

local num = math.random(1, 3)
  print ("math.random: 2 args: " .. num)

Current (Lua-CShap):

math.random: no args: 0.93869702608793
math.random: 1 args: 1.2153242641
math.random: 2 args: 2.1235126233

Actual (Lua):

math.random: no args: 0.93869702608793
math.random: 1 args: 1
math.random: 2 args: 1

[nuskey8]

Merged the PR. Thanks!