Excavator: Upgrades Baseline to the latest version (#340)

Author: svc-excavator-bot

build.gradle

@@ -23,7 +23,7 @@ buildscript {
     dependencies {
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.6.0'
         classpath 'com.palantir.javaformat:gradle-palantir-java-format:2.9.0'
-        classpath 'com.palantir.baseline:gradle-baseline-java:4.55.0'
+        classpath 'com.palantir.baseline:gradle-baseline-java:4.56.0'
         classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:2.5.0'
         classpath 'com.palantir.gradle.gitversion:gradle-git-version:0.12.3'
         classpath 'gradle.plugin.org.inferred:gradle-processors:3.6.0'