Upgrade to Lua version 5.4

[TheModMaker]

The documentation states that this is based on version 5.2. There is now a version 5.3. Need to investigate what changes are needed to be compliant with the new spec and update the documentation.

Changes since 5.2

• Native integer support
  • Bitwise operators
  • math.tointeger, math.ult, math.maxinteger, and math.mininteger
  • math.type
• utf8 library
• string.pack, string.unpack, and string.packsize
• table.move
• Update metamethods

[TheModMaker]

And there has been a new release for Lua 5.4.

Changes since 5.3

• to-be-closed variables
• const variables
• warning system
• new semantics for the integer 'for' loop
• string-to-number coercions moved to the string library