In a small bowl, whisk together the flour, baking soda, cinnamon, nutmeg and salt. Place the butter and sugar in a large bowl and whisk until it is combined and somewhat smooth. Add in the eggs and vanilla bean paste, whisking until combined. Use a spoon to stir in the bananas and coconut milk. Stir in the dry ingredients, mixing until just combined, and then add in the carrots and coconut. Stir just until the batter comes together and the carrots are evenly dispersed.