title: Gradle dependency management plugin
body: <p>I am trying to run the following minimal gradle build file including the dependency management plugin:</p>
  
  <pre><code>buildscript {
      repositories {
          mavenCentral()
          maven {
              url "https://plugins.gradle.org/m2/"
          }
      }
  }
  
  plugins {
      id "java"
      id "io.spring.dependency-management" version "1.0.4.RELEASE"
  }
  </code></pre>
  
  <p>But then running gradle fails:</p>
  
  <pre><code>* What went wrong:
  Plugin [id: 'io.spring.dependency-management', version: '1.0.4.RELEASE'] was not found in any of the following sources:
  
  - Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
  - Plugin Repositories (could not resolve plugin artifact 'io.spring.dependency-management:io.spring.dependency-management.gradle.plugin:1.0.4.RELEASE')
    Searched in the following repositories:
      Gradle Central Plugin Repository
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
  
  * Get more help at https://help.gradle.org
  
  Deprecated Gradle features were used in this build, making it incompatible with Gradle 5.0.
  See https://docs.gradle.org/4.5.1/userguide/command_line_interface.html#sec:command_line_warnings
  </code></pre>
  
  <p>Is there a missing dependency in the gradle file?</p>