Create a method to allocate level up points

[Hayesb20]

• [x] The method will need to take one parameter (that is the attribute to increase)
• [x] Then "apply" a point to the correct attribute. ("applying" a point means the function was called)
• [x] Define a rate at which a attribute increases. ( 1 point == vitality increasing by 10 points?, projection increasing by 5 per points?)