Clean up version handling

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling >=0.25"]
+requires = ["hatchling >=1.5"]
 build-backend = "hatchling.build"
 
 [project]

traitlets/_version.py

@@ -1,12 +1,17 @@
-version_info = (5, 4, 0)
-__version__ = "5.4.0"
+"""
+handle the current version info of traitlets.
+"""
+import re
+from typing import List
 
-# unlike `.dev`, alpha, beta and rc _must not_ have dots,
-# or the wheel and tgz won't look to pip like the same version.
+# Version string must appear intact for hatch versioning
+__version__ = "5.4.0"
 
-assert __version__ == (
-    ".".join(map(str, version_info)).replace(".b", "b").replace(".a", "a").replace(".rc", "rc")
-)
-assert ".b" not in __version__
-assert ".a" not in __version__
-assert ".rc" not in __version__
+# Build up version_info tuple for backwards compatibility
+pattern = r"(?P<major>\d+).(?P<minor>\d+).(?P<patch>\d+)(?P<rest>.*)"
+match = re.match(pattern, __version__)
+assert match is not None
+parts: List[object] = [int(match[part]) for part in ["major", "minor", "patch"]]
+if match["rest"]:
+    parts.append(match["rest"])
+version_info = tuple(parts)