Update pyproject.toml

Author: areibman

pyproject.toml

@@ -10,7 +10,7 @@ tokencost = ["model_prices.json"]
 
 [project]
 name = "tokencost"
-version = "0.1.19"
+version = "0.1.20"
 authors = [
   { name = "Trisha Pan", email = "[email protected]" },
   { name = "Alex Reibman", email = "[email protected]" },