Preheat oven to 350 degrees. Line two baking sheets with parchment paper. In a large bowl, whisk together flour, salt, baking powder, baking soda, cinnamon, ginger, nutmeg and cloves. In a separate bowl, whisk together brown sugar and oil until well combined. Add pumpkin puree and whisk until combined. Add eggs and vanilla and whisk each addition until well combined. Sprinkle flour mixture over pumpkin mixture and whisk until fully incorporated. Use a small ice cream scoop with a release mechanism to drop a tablespoon of dough onto prepared baking sheets, about 1 inch apart. Transfer to oven and bake until a toothpick inserted into the center of each cookie comes out clean, about 20 - 25 minutes. Let cool completely on pan.