chore: adding bumpversion configuration.

Signed-off-by: Matteo Manica <drugilsberg@gmail.com>

.bumpversion.cfg

@@ -0,0 +1,28 @@
+[bumpversion]
+current_version = 2.0.0
+tag = False
+commit = False
+parse = ^
+	(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)
+	(\.(?P<develop>alpha|beta|dev|rc) # pre-release
+	(?P<build>\d+)  # pre-release version num
+	)?
+	(\+(?P<local>.*))?  # local
+serialize = 
+	{major}.{minor}.{patch}.{develop}{build}+{local}
+	{major}.{minor}.{patch}.{develop}{build}
+	{major}.{minor}.{patch}+{local}
+	{major}.{minor}.{patch}
+
+[bumpversion:file:src/rxn/availability/__init__.py]
+search = __version__ = "{current_version}"  # managed by bump2version
+replace = __version__ = "{new_version}"  # managed by bump2version
+
+[bumpversion:part:develop]
+optional_value = _
+values = 
+	_
+	dev
+	alpha
+	beta
+	rc