Improve logging, update to 5.5.1

build.gradle.kts

@@ -1,6 +1,6 @@
 import org.ajoberstar.grgit.Grgit
 
-println("""
+logger.lifecycle("""
 *******************************************
  You are building WorldEdit!
 
@@ -19,9 +19,9 @@ applyRootArtifactoryConfig()
 if (!project.hasProperty("gitCommitHash")) {
     apply(plugin = "org.ajoberstar.grgit")
     ext["gitCommitHash"] = try {
-        (ext["grgit"] as Grgit).head().abbreviatedId
+        (ext["grgit"] as Grgit?)?.head()?.abbreviatedId
     } catch (e: Exception) {
-        println("Error getting commit hash: " + e.message)
+        logger.warn("Error getting commit hash", e)
 
         "no_git_id"
     }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists