Excavator: Update conjure plugins and dependencies (#386)

Author: svc-excavator-bot

versions.lock

@@ -14,8 +14,8 @@ com.google.code.findbugs:jsr305:3.0.2 (1 constraints: 980fcc86)
 com.google.errorprone:error_prone_annotations:2.3.3 (1 constraints: 041129c0)
 com.google.guava:guava:21.0 (3 constraints: f528d884)
 com.jayway.awaitility:awaitility:1.7.0 (1 constraints: 0a050536)
-com.palantir.conjure.java:conjure-lib:4.5.0 (1 constraints: 0b050e36)
-com.palantir.conjure.java.api:errors:2.6.0 (1 constraints: f00f7c99)
+com.palantir.conjure.java:conjure-lib:4.7.0 (1 constraints: 0d051436)
+com.palantir.conjure.java.api:errors:2.8.1 (1 constraints: f30f8399)
 com.palantir.conjure.java.runtime:conjure-java-jackson-serialization:4.18.1 (1 constraints: 4005543b)
 com.palantir.ri:resource-identifier:1.0.1 (1 constraints: ea0f6699)
 com.palantir.safe-logging:preconditions:1.11.0 (3 constraints: b82da857)

versions.props

@@ -12,7 +12,7 @@ org.slf4j:* = 1.7.12
 one.util:streamex = 0.6.8
 org.assertj:assertj-core = 3.13.2
 com.palantir.conjure:conjure = 4.7.0
-com.palantir.conjure.java:* = 4.5.0
+com.palantir.conjure.java:* = 4.7.0
 com.fasterxml.jackson.dataformat:* = 2.9.9
 one.util:streamex = 0.6.8
 com.github.tomakehurst:wiremock = 2.24.0