Update silencer-lib, silencer-plugin to 1.7.9 (#1142)
Update silencer-lib, silencer-plugin to 1.7.9 (#1142)

Co-authored-by: Cédric Chantepie <6aefa58cca4839682aa3bb254e6f6fa34caef78c@users.noreply.github.com>
ReactiveMongo/ReactiveMongo,ReactiveMongo/ReactiveMongo