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

@@ -8,11 +8,11 @@ parse = """(?x)
     (?P<patch>0|[1-9]\\d*)
     (?:
         \\.(?P<smallpatch>0|[1-9]\\d*)
-    )?
+    )?                                  # smallpatch section is optional
     (?:
-        (?P<pre_l>[a-zA-Z-]+)         # pre-release label
-        (?P<pre_n>[1-9]\\d*)        # pre-release version number
-    )?                                # pre-release section is optional
+        (?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}{pre_l}{pre_n}",