Increment version to 1.5.4

Author: dbrunton

setup.py

@@ -26,7 +26,7 @@
 
 setup(
     name = 'bagit',
-    version = '1.5.3',
+    version = '1.5.4',
     url = 'https://libraryofcongress.github.io/bagit-python/',
     author = 'Ed Summers',
     author_email = '[email protected]',