v1.1.0

• Compute the distance to the goal using the current state value, instead of a simple incrementation using the number of steps from the starting point.
• Heap storage for the nodes, to reduce the number of slices & maps. Reduces the fetch of next node
• One call to fetchNodeInHeap instead of two
• Hash with XOR incrementation
• Simplified hash using a simple hash multiplication
• Unit Test coverage ~90%
• Code documentation