Add more compatibility to Polynomials.

Author: Hugo Levy-Falk

Project.toml

@@ -1,7 +1,7 @@
 name = "SPEFiles"
 uuid = "ed854f67-b1dc-40c1-a595-92080aa32ec0"
 authors = ["Hugo Levy-Falk <hugo.levy-falk@universite-paris-saclay.fr> and contributors"]
-version = "0.4.0"
+version = "0.4.1"
 
 [deps]
 LightXML = "9c8b4983-aa76-5018-a973-4c85ecc9e179"
@@ -10,7 +10,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 
 [compat]
 LightXML = "0.9"
-Polynomials = "4"
+Polynomials = "1 - 4"
 Tables = "1"
 julia = "1"