add Lua lang

lua/gildedrose-dev-1.rockspec

@@ -0,0 +1,19 @@
+rockspec_format = "3.0"
+package = "gildedrose"
+version = "dev-1"
+source = {
+   url = "https://github.com/emilybache/GildedRose-Refactoring-Kata.git"
+}
+description = {
+   license = "MIT"
+}
+dependencies = {
+   "lua >= 5.1, < 5.5"
+}
+test_dependencies = {
+   "busted >= 2.2"
+}
+test = {
+   type = "command",
+   command = "busted"
+}