bump julia compat bound

dkarrasch · dkarrasch · commit 6ef9abbabb7c · 2021-11-04T10:05:39.000+01:00
diff --git a/Project.toml b/Project.toml
@@ -7,7 +7,7 @@ LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [compat]
-julia = "1"
+julia = "1.6"
 
 [extras]
 Aqua = "4c88cf16-eb10-579e-8560-4a9242c79595"
