Bump com.github.johnrengelman.shadow from 7.0.0 to 7.1.0 (#27)

Bumps com.github.johnrengelman.shadow from 7.0.0 to 7.1.0.

---
updated-dependencies:
- dependency-name: com.github.johnrengelman.shadow
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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build.gradle

@@ -2,7 +2,7 @@ plugins {
     id "org.sonarqube" version "3.3"
     id "java"
     id "idea"
-    id 'com.github.johnrengelman.shadow' version '7.0.0'
+    id 'com.github.johnrengelman.shadow' version '7.1.0'
     id 'maven-publish'
 }