Alter the value on the DOM based on the state of the store.
Export a class and its constructor.
Counter class should have a key/value map property called store
.
Counter class should have a method that can reset the store back to its original constructor state.
Counter class needs a method that can incremet a key value up.
Counter class needs a method that can decrement a key value down.
Counter class needs a method that can decrement a key value down.
npm install
npm test