chore(tooling): lock to a specific webdriverio version
chore(tooling): lock to a specific webdriverio version

Somewhere between 4.8.0 and 4.9.5, something screwed up plugin handling

urbenlegend/spark-js-sdk,bbender/spark-js-sdk,adamweeks/spark-js-sdk,mwegman/spark-js-sdk,aimeex3/spark-js-sdk,aimeex3/spark-js-sdk,ciscospark/spark-js-sdk,tran2/spark-js-sdk,tran2/spark-js-sdk,adamweeks/spark-js-sdk,ciscospark/spark-js-sdk,bbender/spark-js-sdk,urbenlegend/spark-js-sdk,mwegman/spark-js-sdk,bbender/spark-js-sdk,aimeex3/spark-js-sdk,mwegman/spark-js-sdk,adamweeks/spark-js-sdk