Always enable E2EE in libQuotient

It's off-by-default in libQuotient 0.8

src/main.cpp

@@ -195,6 +195,10 @@ int main(int argc, char *argv[])
 
     initLogging();
 
+#if Quotient_VERSION_MINOR == 8
+    Connection::setEncryptionDefault(true);
+#endif
+
 #ifdef NEOCHAT_FLATPAK
     // Copy over the included FontConfig configuration to the
     // app's config dir: