refactor: rename newUserdataUV -> newUserdata

Although Lua 5.4 renamed this function, the old name is fine and more
clear

Author: natecraddock

src/tests.zig

@@ -800,7 +800,7 @@ test "userdata and uservalues" {
     };
 
     // create a Lua-owned pointer to a Data with 2 associated user values
-    var data = lua.newUserdataUV(Data, 2);
+    var data = lua.newUserdata(Data, 2);
     data.val = 1;
     std.mem.copy(u8, &data.code, "abcd");
 
@@ -1468,7 +1468,7 @@ test "userdata" {
     const Type = struct { a: i32, b: f32 };
     try lua.newMetatable("Type");
 
-    var t = lua.newUserdataUV(Type, 0);
+    var t = lua.newUserdata(Type, 0);
     lua.setMetatableAux("Type");
     t.a = 1234;
     t.b = 3.14;

src/ziglua.zig

@@ -695,13 +695,12 @@ pub const Lua = struct {
     }
 
     /// This function creates and pushes a new full userdata onto the stack
-    /// with `num_uvalue` associated Lua values, plus an associated block of raw memory with `size` bytes
+    /// with `upvalues` associated Lua values, plus an associated block of raw memory with `size` bytes
     /// Returns the address of the block of memory
-    /// TODO: rename to newUserdata?
-    pub fn newUserdataUV(lua: *Lua, comptime T: type, new_uvalue: i32) *T {
+    pub fn newUserdata(lua: *Lua, comptime T: type, upvalues: i32) *T {
         // safe to .? because this function throws a Lua error on out of memory
         // so the returned pointer should never be null
-        const ptr = c.lua_newuserdatauv(lua.state, @sizeOf(T), new_uvalue).?;
+        const ptr = c.lua_newuserdatauv(lua.state, @sizeOf(T), upvalues).?;
         return opaqueCast(T, ptr);
     }