Add in the lentils, tomatoes, both kinds of beans, the pumpkin, broth, chili powder, cumin, paprika, cinnamon and salt. Mix to combine. Increase the heat and bring the mixture to a boil. Cover, reduce the heat and simmer for about 35 to 40 minutes, until the lentils are tender and the chili has thickened up. Taste and season with additional salt as needed. Serve as desired.