update

src/interface.jl

@@ -32,7 +32,7 @@ using ..type, ..mcts, ..util
     aggressively explore new state.
 
 # Return
-  - `(bestNextState, BestFinalState)::@NamedTuple{bestNextState::T, bestFinalState::T}`
+  - `NamedTuple{(:bestNextState, :bestFinalState), Tuple{T, T}}`
     the best next state and the best final state
 
 # Example
@@ -49,7 +49,7 @@ function runMCTS(
   maxdepth::Integer=3, 
   maxiterations::Integer=10, 
   explorationweight::Number=1.0,
-  )::@NamedTuple{bestNextState::T, bestFinalState::T} where {T<:Any}
+  )::NamedTuple{(:bestNextState, :bestFinalState), Tuple{T, T}} where {T<:Any}
   
   root = MCTSNode("root", initialstate, 0, 0, 0, 0, false, nothing, Dict{String, MCTSNode}())