Update version

Author: mewilhel

Project.toml

@@ -1,7 +1,7 @@
 name = "McCormick"
 uuid = "53c679d3-6890-5091-8386-c291e8c8aaa1"
 authors = ["Matthew Wilhelm <matthew.wilhelm@uconn.edu>"]
-version = "0.6.0"
+version = "0.6.1"
 
 [deps]
 DiffRules = "b552c78f-8df3-52c6-915a-8e097449b14b"
@@ -16,7 +16,7 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 DiffRules = "0.0.5, 0.0.6, 0.0.7, 0.0.8, 0.0.9, 0.0.10, 0.1.0, ~1.0"
 DocStringExtensions = "~0.8"
 ForwardDiff = "~0.5.0, ~0.6, ~0.7, ~0.8, ~0.9, ~0.10"
-IntervalArithmetic = "0.16.3, 0.16.4, 0.16.5, 0.16.6, 0.16.7"
+IntervalArithmetic = "0.16.3, 0.16.4, 0.16.5, 0.16.6, 0.16.7, ~0.17"
 Reexport = "~0.2"
 StaticArrays = "~0.8, ~0.9, ~0.10, ~0.11, ~0.12"
 julia = "~1.1, ~1.2, ~1.3, ~1.4"