Fixed loop instructions, local registers in other instructions, upvalues and tables. Builds and passes test.

src/tests/script.lua

@@ -1,2 +1,9 @@
-local table = { "hello", "friend" }
-print(table[1], table[2])
+local var = 2
+local function thing()
+    print(var)
+    var = 3
+end
+
+print(var)
+thing()
+thing()