Excavator: Update conjure plugins and dependencies (#599)

Author: svc-excavator-bot

versions.props

@@ -11,7 +11,7 @@ org.mockito:* = 3.9.0
 org.slf4j:* = 1.7.12
 one.util:streamex = 0.7.2
 org.assertj:assertj-core = 3.14.0
-com.palantir.conjure:conjure = 4.16.0
+com.palantir.conjure:conjure = 4.16.1
 com.palantir.conjure.java:* = 5.61.0
 com.fasterxml.jackson.dataformat:* = 2.10.2
 one.util:streamex = 0.7.2