raise compat for Colors v0.13 (#90)

Author: schillic

Project.toml

@@ -17,7 +17,7 @@ SemialgebraicSets = "8e049039-38e8-557d-ae3a-bc521ccf6204"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [compat]
-Colors = "0.12"
+Colors = "0.12 - 0.13"
 CommonSolve = "0.2"
 MultivariateBases = "0.2"
 MultivariatePolynomials = "0.5"