[High Priority] Excavator: Upgrade buildscript dependencies (#875)

Author: svc-excavator-bot

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         classpath 'com.palantir.gradle.jdks:gradle-jdks:0.37.0'
         classpath 'com.palantir.gradle.jdkslatest:gradle-jdks-latest:0.14.0'
         classpath 'com.palantir.baseline:gradle-baseline-java:5.50.0'
-        classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:2.27.0'
+        classpath 'com.palantir.gradle.consistentversions:gradle-consistent-versions:2.28.0'
         classpath 'com.palantir.gradle.externalpublish:gradle-external-publish-plugin:1.19.0'
         classpath 'com.palantir.gradle.failure-reports:gradle-failure-reports:1.13.0'
         classpath 'com.palantir.gradle.gitversion:gradle-git-version:3.1.0'