message: update pom version to 4.0.0
diff: <groupId>io.github.jhipster.registry</groupId>
  <artifactId>jhipster-registry</artifactId>
  - <version>3.3.0</version>
  + <version>4.0.0</version>
  <packaging>war</packaging>
  <name>JHipster Registry</name>
  <description>JHipster service registry, made with Netflix Eureka and Spring Cloud Config</description>
  <profile.swagger />
  <!-- Dependency versions -->
  - <jhipster-dependencies.version>2.0.13</jhipster-dependencies.version>
  + <jhipster-dependencies.version>2.0.14</jhipster-dependencies.version>
  <!-- The spring-boot version should match the one managed by
  https://mvnrepository.com/artifact/io.github.jhipster/jhipster-dependencies/${jhipster-dependencies.version} -->
  <spring-boot.version>2.0.3.RELEASE</spring-boot.version>
  