Bumps akka to 2.4.19 as suggested by Akka team (#794)
Bumps akka to 2.4.19 as suggested by Akka team (#794)

* Bumps akka to 2.4.19 as suggested by Akka team

* Upgrade whitelist (agrona and aeron) and fix dependencies.

rcavalcanti/lagom,rcavalcanti/lagom,rstento/lagom,TimMoore/lagom,rstento/lagom,rcavalcanti/lagom,TimMoore/lagom,lagom/lagom,lagom/lagom,rstento/lagom,rstento/lagom,ignasi35/lagom,TimMoore/lagom,ignasi35/lagom,lagom/lagom,edouardKaiser/lagom,ignasi35/lagom,TimMoore/lagom,lagom/lagom,TimMoore/lagom,edouardKaiser/lagom,rstento/lagom,edouardKaiser/lagom,lagom/lagom,edouardKaiser/lagom,ignasi35/lagom,rcavalcanti/lagom,ignasi35/lagom