updating and testing Sam's bumpversion work

• this replaces MR!1498
• now handles 3 and 4 digit releases

❯ bump-my-version show-bump 2.8.2.3rc1
2.8.2.3rc1 ── bump ─┬─ major ─ 3.0.0dev0
                    ├─ minor ─ 2.9.0dev0
                    ├─ patch ─ 2.8.3dev0
                    ├─ pre_l ─ 2.8.2.3
                    ╰─ pre_n ─ 2.8.2.3rc2

To test: ❯ bump-my-version bump pre_l --current-version=2.8.2.3rc1 --config-file=./.bumpversion.toml --ignore-missing-version the ignore-missing-version flag is required to bypass updating pycapo

.bumpversion.toml

@@ -2,7 +2,7 @@
 # Docs: https://callowayproject.github.io/bump-my-version/
 # NB: Run with `--ignore-missing-version` flag to ignore PyCAPO's version
 [tool.bumpversion]
-current_version = "2.8.2.4dev0"
+current_version = "2.8.2.3rc1"
 parse = """(?x)
     (?P<major>0|[1-9]\\d*)\\.
     (?P<minor>0|[1-9]\\d*)\\.
@@ -12,7 +12,7 @@ parse = """(?x)
     )?                                  # smallpatch section is optional
     (?:
         (?P<pre_l>[a-zA-Z-]+)           # pre-release label
-        (?P<pre_n>[1-9]\\d*)            # pre-release version number
+        (?P<pre_n>0|[1-9]\\d*)            # pre-release version number
     )?                                  # pre-release section is optional
 """
 serialize = [
@@ -22,11 +22,15 @@ serialize = [
     "{major}.{minor}.{patch}",
 ]
 allow_dirty = true
+ignore_missing_version = true
 
 [tool.bumpversion.parts.pre_l]
 values = ["dev", "rc", "final"]
 optional_value = "final"
 
+[tool.bumpversion.parts.pre_n]
+first_value = "1"
+
 [[tool.bumpversion.files]]
 glob = "apps/cli/executables/pexable/*/pyproject.toml"
 search = "version = \"{current_version}\""
@@ -68,4 +72,4 @@ replace = "RELEASE_VERSION: {new_version}"
 filename = "services/workflow/gitlab-requirements.txt"
 
 [[tool.bumpversion.files]]
-filename = "apps/cli/executables/go/spelunker/main.go"
\ No newline at end of file
+filename = "apps/cli/executables/go/spelunker/main.go"