Update package versions.

Author: rnixx

CHANGES.rst

@@ -2,7 +2,7 @@
 Changes
 =======
 
-1.3.0 (unreleased)
+2.0.0 (unreleased)
 ------------------
 
 - Refactor package layout to use ``pyproject.toml`` and implecit namespace packages.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "node"
-version = "1.3.0.dev0"
+version = "2.0.0.dev0"
 description = "Building data structures as node trees"
 readme = "README.rst"
 license = {text = "Simplified BSD"}