Bump version to 0.12.0

Version 1.0 approaches!

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "vrobbler"
-version = "0.11.4"
+version = "0.11.5"
 description = ""
 authors = ["Colin Powell <colin@unbl.ink>"]