Modify package.lua for lit;

package.lua → graphql/package.lua

@@ -4,5 +4,8 @@ return {
   description = 'Lua GraphQL implementation',
   license = 'MIT',
   author = { url = 'https://github.com/bjornbytes' },
-  homepage = 'https://github.com/bjornbytes/graphql-lua'
+  homepage = 'https://github.com/bjornbytes/graphql-lua',
+  files = {
+    '*.lua'
+  }
 }