Bump ch.qos.logback:logback-classic from 1.2.9 to 1.2.13 in /src/server #1492

Job	Run time
Build Reaper	6m 47s
Docker Image Tests (cassandra, docker)	7m 15s
Cassandra backend (binary:3.0.25, cassandra, ccm)	30m 24s
Memory backends (binary:3.0.25, local, ccm)	30m 19s
HTTP Management (binary:4.0.6, ccm, http-api, 1, 1)	30m 30s
Cassandra backend (binary:3.11.16, cassandra, ccm)	30m 21s
Memory backends (binary:3.11.16, local, ccm)	30m 23s
Cassandra backend (binary:4.0.6, cassandra, ccm)	30m 27s
HTTP Management (binary:3.11.16, ccm, http-api, 1, 1)	30m 25s
Memory backends (binary:4.0.6, local, ccm)	30m 23s
Sidecar	0s
Each DC Availability	0s
Distributed tests	0s
Flapping reapers	0s
Release Reaper	0s
	4h 17m 14s

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