Simplify update in interface State

src/main/java/model/State.java

src/main/java/model/automata/BiColorState.java

src/main/java/model/automata/BriansBrainState.java

src/main/java/model/automata/GameOfLifeState.java

src/main/java/model/automata/SeedsState.java

src/test/java/model/automata/GameOfLifeStateTest.java