Fix typo

Author: davidanthoff

Project.toml

@@ -14,7 +14,7 @@ WeakRefStrings = "ea10d353-3f73-51f8-a26c-33c1cb351aa5"
 [compat]
 CodecZlib = "0.6"
 DataStructures = "0.17"
-DoubleFloats = "0., 1"
+DoubleFloats = "0.9, 1"
 Nullables = "0.0.7, 0.0.8, 1"
 WeakRefStrings = "0.5, 0.6"
 julia = "1"