Implement support for CLOSE

[XmiliaH]

TTLC is not fully self-hosting as the VM relies on correct upvalue close behavior for the closure implementation in

The-Tiny-Lua-Compiler/the-tiny-lua-compiler.lua

Lines 4251 to 4257 in ca95cdb

	stack[a] = function(...)
	self:pushClosure(tClosure)
	local returns = { self:executeClosure(...) }
	self:pushClosure(closure)
	return unpack(returns)
	end

This also fixes break being allowed outside of loops.