upgrade version

Author: BrandonArp

pom.xml

@@ -90,7 +90,7 @@
     <logback.steno.version>2.1.2</logback.steno.version>
     <log4j.over.slf4j.version>2.0.16</log4j.over.slf4j.version>
     <metrics.aggregator.protocol.prometheus.version>1.1.0</metrics.aggregator.protocol.prometheus.version>
-    <metrics.aggregator.protocol.version>1.1.0</metrics.aggregator.protocol.version>
+    <metrics.aggregator.protocol.version>1.2.1</metrics.aggregator.protocol.version>
     <metrics.client.version>0.13.0</metrics.client.version>
     <metrics.client.http.version>0.13.1</metrics.client.http.version>
     <metrics.client.incubator.version>0.13.0</metrics.client.incubator.version>