lmmur 0.9.0 is out, but no source code available

In GitHub repository last commit is from August, last release is 0.8.0, but in Google Play and F-Droid, new version is available to download, but with integrated browser issue. I can't fix this issue by myself and also, old version 0.8.0 from January is outdated and I cannot login to my account. Isn't lemmur open source no more?