DynamicArray with initial size keeps null values

[pitzzahh]

    /**
     * Creates a {@code DynamicArray} object with an initial size
     * @param initialSize the initial size of the array.
     */
    public DynamicArray(int initialSize) {
        if (initialSize > 0) this.balloon = new Object[initialSize];
        else if (initialSize == 0) this.balloon = new Object[]{};
        else throw new IllegalArgumentException("Illegal Capacity: " + initialSize);
    }

For removal, dynamic array size should increase based on the inserted elements

[pitzzahh]

Fixed on commit: a99fa55