Fix S3 PR for 1.12 build

Author: mikeprimm

oldbuilds/build.gradle

@@ -16,6 +16,7 @@ allprojects  {
   repositories {
      mavenLocal()
      maven { url "https://oss.sonatype.org/content/repositories/releases" }
+     maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
      maven { url "https://repo.mikeprimm.com" }
      maven { url "https://repo.maven.apache.org/maven2" }
      maven { url "https://hub.spigotmc.org/nexus/content/repositories/snapshots/" }