Excavator: Update open-source publishing plugins (#743)

Author: svc-excavator-bot

build.gradle

@@ -26,7 +26,7 @@ buildscript {
         classpath 'com.palantir.gradle.jdks:gradle-jdks:0.48.0'
         classpath 'com.palantir.gradle.jdkslatest:gradle-jdks-latest:0.13.0'
         classpath 'com.palantir.gradle.plugintesting:gradle-plugin-testing:0.6.0'
-        classpath 'com.gradle.publish:plugin-publish-plugin:1.3.0'
+        classpath 'com.gradle.publish:plugin-publish-plugin:1.3.1'
         classpath 'com.palantir.baseline:gradle-baseline-java:6.13.0'
         classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:2.25.0'
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.19.0'