Bump de.undercouch.download from 5.4.0 to 5.5.0

Bumps [de.undercouch.download](https://github.com/michel-kraemer/gradle-download-task) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/michel-kraemer/gradle-download-task/releases)
- [Commits](michel-kraemer/gradle-download-task@5.4.0...5.5.0)

---
updated-dependencies:
- dependency-name: de.undercouch.download
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -29,7 +29,7 @@ plugins {
     id 'maven-publish'                                  // Publishing to Maven Central
     id 'pmd'                                            // PMD for Java, configured further below
     id 'idea'                                           // For IntelliJ IDEA users
-    id "de.undercouch.download" version '5.4.0'         // Shows download percentage
+    id "de.undercouch.download" version '5.5.0'         // Shows download percentage
     id 'edu.sc.seis.launch4j' version '3.0.4'           // Creates launch4j
     id 'com.github.ben-manes.versions' version '0.47.0' // Checks versions for plugins and dependencies
     id "com.dorongold.task-tree" version '2.1.1'        // Prints the task dependency tree