chore(version): update theme-pack version to 0.1.2.dev0

Author: mofojed

plugins/theme-pack/setup.cfg

@@ -3,7 +3,7 @@ name = deephaven-plugin-theme-pack
 description = Deephaven Theme Pack Plugin
 long_description = file: src/js/README.md
 long_description_content_type = text/markdown
-version = 0.1.2
+version = 0.1.2.dev0
 url = https://github.com/deephaven/deephaven-plugins
 project_urls =
     Source Code = https://github.com/deephaven/deephaven-plugins