update skywalking-agent 8.12.0 => 8.13.0

docker/skywalking/agent/LICENSE

@@ -216,7 +216,7 @@ The following components are provided under the Apache License. See project link
 The text of each license is the standard Apache 2.0 license.
 
     raphw (byte-buddy) 1.12.13: http://bytebuddy.net/ , Apache 2.0
-    Google: grpc-java 1.44.0: https://github.com/grpc/grpc-java, Apache 2.0
+    Google: grpc-java 1.50.0: https://github.com/grpc/grpc-java, Apache 2.0
     Google: gson 2.8.9: https://github.com/google/gson , Apache 2.0
     Google: proto-google-common-protos 2.0.1: https://github.com/googleapis/googleapis , Apache 2.0
     Google: jsr305 3.0.2: http://central.maven.org/maven2/com/google/code/findbugs/jsr305/3.0.0/jsr305-3.0.0.pom , Apache 2.0

docker/skywalking/agent/config/agent.config

@@ -100,7 +100,7 @@ collector.heartbeat_period=${SW_AGENT_COLLECTOR_HEARTBEAT_PERIOD:30}
 # collector.heartbeat_period * collector.properties_report_period_factor seconds
 collector.properties_report_period_factor=${SW_AGENT_COLLECTOR_PROPERTIES_REPORT_PERIOD_FACTOR:10}
 # Backend service addresses.
-# collector.backend_service=${SW_AGENT_COLLECTOR_BACKEND_SERVICES:127.0.0.1:11800}
+collector.backend_service=${SW_AGENT_COLLECTOR_BACKEND_SERVICES:127.0.0.1:11800}
 # How long grpc client will timeout in sending data to upstream. Unit is second.
 collector.grpc_upstream_timeout=${SW_AGENT_COLLECTOR_GRPC_UPSTREAM_TIMEOUT:30}
 # Sniffer get profile task list interval.