Fix shadowing (#7)

Reviewed-on: #7
Co-authored-by: jolheiser <john.olheiser@gmail.com>
Co-committed-by: jolheiser <john.olheiser@gmail.com>

build.gradle

@@ -37,7 +37,7 @@ java.sourceCompatibility = JavaVersion.VERSION_1_8
 shadowJar {
     project.configurations.implementation.canBeResolved = true
     configurations = [project.configurations.implementation]
-    relocate 'xyz.etztech', 'shadow.xyz.etztech'
+    relocate 'xyz.etztech.core', 'shadow.xyz.etztech.core'
     archiveClassifier.set('')
 }