Lua version change to 5.3.5 (#458)

Update Lua version to make plugin development easier across platforms
and simplify Windows builds by using vcpkg.

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vcpkg.json

@@ -14,12 +14,17 @@
     "openssl",
     "rapidjson",
     "sol2",
-    "curl"
+    "curl",
+    "lua"
   ],
   "overrides": [
     {
       "name": "sol2",
       "version": "3.3.1"
+    },
+    {
+      "name": "lua",
+      "version": "5.3.5#6"
     }
   ],
   "builtin-baseline": "5bf0c55239da398b8c6f450818c9e28d36bf9966"