Updated gradle to 5.4.1 (#56)

Author: Daniel Rees

build.gradle

@@ -3,9 +3,9 @@ plugins {
   id 'java'
   id 'jacoco'
   id 'org.jetbrains.kotlin.jvm' version '1.3.31'
-  id 'nebula.project' version '4.0.1'
-  id "nebula.maven-publish" version "7.2.4"
-  id 'nebula.nebula-bintray' version '3.5.5'
+  id 'nebula.project' version '6.0.3'
+  id "nebula.maven-publish" version '9.5.4'
+  id 'nebula.nebula-bintray' version '5.0.0'
 }
 
 group 'com.github.dsrees'

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Jul 13 09:35:17 EDT 2018
+#Thu Jun 13 12:25:29 EDT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip