LightSports v1.21.34

No uninstall. This is an ordinary update. v1.20 was signed with a brand-new certificate, which
meant it could only be installed by removing the app first and losing followed teams, alert settings and the score snapshot.
That cost was not worth what it bought, so it has been withdrawn. v1.21 is signed with the same
certificate every release before v1.20 used, and it installs straight over the copy on your phone.

If you already uninstalled and installed v1.20, this one will not go over it — uninstall once more
and install v1.21, and that is the end of it.

What this does and does not fix. The signing key is no longer committed to this repository and
the file is gitignored, so a fresh clone does not hand it out. But it is still in this repository's
git history and always will be, so treat it as public: anyone determined enough can still build an
APK this phone would accept as an update. Closing that for real needs an APK Signature Scheme v3
rotation — signing with a new key while carrying a proof-of-rotation signed by the old one, which
Android accepts as a normal update — and that is a separate change, done carefully, not bundled in
behind an uninstall.

Everything else in v1.20 stands and is still here.

Full Changelog: v1.20.33...v1.21.34