test(integration): Remove package-lock file (#345)
test(integration): Remove package-lock file (#345)

Fixing the error " _.flatMap is not a function". Red build was caused by a lingering package-lock.json file. Remove the package-lock file untill they are more stable and reliable.
stryker-mutator/stryker,stryker-mutator/stryker,stryker-mutator/stryker