CI-build-51

🎲 Nightly build of 44f4091 ➾ Worker image: Visual Studio 2015; Console: ci.appveyor.com/.../build-51

❕ Only for tests! ❕ 🗨 Commit message:

+void lua_pushcfunction (lua_State *L, lua_CFunction f); /Lua 5.1; 5.2; 5.3

+void lua_arith (lua_State *L, int op); /Lua 5.2; 5.3
+const char *lua_tostring (lua_State *L, int index); /5.1, 5.2, 5.3
+void lua_insert (lua_State *L, int index); /Lua 5.1; 5.2; 5.3
+void lua_remove (lua_State *L, int index); /Lua 5.1; 5.2; 5.3
+void lua_replace (lua_State *L, int index); / Lua 5.1; 5.2; 5.3
+void lua_register (lua_State *L, const char *name, lua_CFunction f); /Lua 5.1; 5.2; 5.3
+size_t lua_rawlen (lua_State *L, int index); /Lua 5.2; 5.3
+size_t lua_objlen (lua_State *L, int index); /Lua 5.1

Added forgotten declaration for 5.2 & 5.3: +int lua_pushthread (lua_State *L);