update compat for FastRounding (#507)

Author: JeffreySarnoff

Project.toml

@@ -17,7 +17,7 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 [compat]
 CRlibm = "0.7, 0.8, 1"
 IntervalContractors = "0.4"
-FastRounding = "0.2"
+FastRounding = "0.2, 0.3"
 Polynomials = "0.7"
 RecipesBase = "1.0"
 RoundingEmulator = "0.2"