Add bump2version

.bumpversion.cfg

@@ -0,0 +1,11 @@
+[bumpversion]
+current_version = 0.2
+parse = (?P<major>\d+)\.(?P<minor>\d+)(\.(?P<patch>\d+))?
+commit = True
+tag = True
+tag_name = {new_version}
+sign_tags = True
+
+[bumpversion:file:docs/conf.py]
+
+[bumpversion:file:gentle/__init__.py]

.bumpversion.cfg.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2023 Anna <cyber@sysrq.in>
+
+SPDX-License-Identifier: CC0-1.0