Add identifier "Programming Language :: Lua" (#145)

Author: amotl

src/trove_classifiers/__init__.py

@@ -456,6 +456,7 @@
     "Programming Language :: Kotlin",
     "Programming Language :: Lisp",
     "Programming Language :: Logo",
+    "Programming Language :: Lua",
     "Programming Language :: ML",
     "Programming Language :: Modula",
     "Programming Language :: OCaml",