im-online was removed on Kusama

[tugytur]

With the latest runtime upgrade 1.2.0 on Kusama the im-online pallet was removed as mentioned here

Now it throws the following error:

/opt/polkadot-watcher/dist/utils.js:35
    const blockThreshold = yield api.query.imOnline.heartbeatAfter(); //threshold after which an heartbeat is expected
                                                    ^
TypeError: Cannot read property 'heartbeatAfter' of undefined
    at /opt/polkadot-watcher/dist/utils.js:35:53
    at Generator.next (<anonymous>)
    at /opt/polkadot-watcher/dist/utils.js:9:71
    at new Promise (<anonymous>)
    at __awaiter (/opt/polkadot-watcher/dist/utils.js:5:12)
    at isHeadAfterHeartbeatBlockThreshold (/opt/polkadot-watcher/dist/utils.js:33:61)
    at Subscriber.<anonymous> (/opt/polkadot-watcher/dist/subscriber.js:242:94)
    at Generator.next (<anonymous>)
    at /opt/polkadot-watcher/dist/subscriber.js:8:71
    at new Promise (<anonymous>)