RLS: setup a minor release for v0.7.3

Author: mmcky

src/quantecon_book_theme/__init__.py

@@ -12,7 +12,7 @@
 
 from .launch import add_hub_urls
 
-__version__ = "0.7.2"
+__version__ = "0.7.3"
 """quantecon-book-theme version"""
 
 SPHINX_LOGGER = logging.getLogger(__name__)