Bump version to 0.2.0

setup.py

@@ -2,7 +2,7 @@ from setuptools import setup
 
 setup(
         name="yaboli",
-        version="0.1.0",
+        version="0.2.0",
         packages=["yaboli"],
         install_requires=["websockets==7.0"],
 )
@@ -11,3 +11,18 @@ setup(
 # - update the README.md installation instructions
 # - update the changelog
 # - set a tag to the update commit
+
+# Meanings of version numbers
+#
+# Format: a.b.c
+#
+# a - increased when: major change such as a rewrite
+# b - increased when: changes breaking backwards compatibility
+# c - increased when: minor changes preserving backwards compatibility
+#
+# To specify version requirements for yaboli, the following format is
+# recommended if you need version a.b.c:
+#
+# yaboli >=a.b.c, <a.b+1.c
+#
+# "b+1" is the version number of b increased by 1, not "+1" appended to b.