Fix naming hyphenation from boilerplate

merkle_tree_stream/__init__.py

@@ -0,0 +1,12 @@
+"""merkle-tree-stream module."""
+
+try:
+    import pkg_resources
+except ImportError:
+    pass
+
+
+try:
+    __version__ = pkg_resources.get_distribution('merkle_tree_stream').version
+except Exception:
+    __version__ = 'unknown'