Bump version to release candidate

Kenny2github · Kenny2github · commit 5eea2c244f2c · 2021-02-08T14:58:40.000+08:00
diff --git a/mahjong/__init__.py b/mahjong/__init__.py
@@ -20,7 +20,7 @@
 https://github.com/Kenny2github/mahjong/wiki
 """
 
-__version__ = "1.0.0"
+__version__ = "2.0.0rc1"
 __all__ = [
     'TurnEnding',
     'HandEnding',
