Merge pull request #100 from jonaspleyer/indexmap-versions

allow wider range of indexmap versions

Author: jonaspleyer

approx/Cargo.toml

@@ -40,4 +40,4 @@ num-complex = { version = "0.4.6", optional = true }
 ordered-float = { version = "5.0", optional = true }
 approx-derive = { path = "../approx-derive/", version = "0.6.0-rc1" }
 paste = { version = "1.0.15", optional = true }
-indexmap = { version = "2.12.1", optional = true, default-features = false }
+indexmap = { version = ">=2.0", optional = true, default-features = false }