Change license id so it's accepted by crates.io

progval · progval · commit 52957a13b800 · 2018-06-17T20:55:27.000+02:00
rust-lang/crates.io#1435
diff --git a/Cargo.toml b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "python-parser"
 version = "0.1.0"
 authors = ["Valentin Lorentz <progval+git@progval.net>"]
-license = "GPL-3.0-or-later"
+license = "GPL-3.0+"
 description = "A complete Python parser based on nom."
 documentation = "https://docs.rs/python-parser"
 repository = "https://github.com/ProgVal/rust-python-parser"
