fixed parsing to support possible 3 or 4 digit versioning

.bumpversion.toml

 # Config for bump-my-version
 # Docs: https://callowayproject.github.io/bump-my-version/
 [tool.bumpversion]
-current_version = "2.8.2.1rc1"
-parse = "(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)\\.(?P<smallpatch>\\d+)(rc(?P<rc>\\d+))?"
+current_version = "2.8.2.3rc1"
+parse = """(?x)
+    (?P<major>0|[1-9]\\d*)\\.
+    (?P<minor>0|[1-9]\\d*)\\.
+    (?P<patch>0|[1-9]\\d*)
+    (?:
+        \\.(?P<smallpatch>0|[1-9]\\d*)
+    )?
+    (?:
+        (?P<pre_l>[a-zA-Z-]+)         # pre-release label
+        (?P<pre_n>[1-9]\\d*)        # pre-release version number
+    )?                                # pre-release section is optional
+"""
 serialize = [
-    "{major}.{minor}.{patch}.{smallpatch}rc{rc}",
+    "{major}.{minor}.{patch}{pre_l}{pre_n}",
+    "{major}.{minor}.{patch}.{smallpatch}{pre_l}{pre_n}",
     "{major}.{minor}.{patch}.{smallpatch}",
-    "{major}.{minor}.{patch}rc{rc}",
-    "{major}.{minor}.{patch}"
+    "{major}.{minor}.{patch}",
 ]
 allow_dirty = true
 
+[tool.bumpversion.parts.pre_l]
+values = ["dev", "rc", "final"]
+optional_value = "final"
+
 [[tool.bumpversion.files]]
 glob = "apps/cli/executables/pexable/*/pyproject.toml"
 excluded_paths = "apps/cli/executables/pexable/pycapo/*"