Update shadow config

Author: jpenilla

examples/example-bukkit/build.gradle.kts

@@ -37,6 +37,10 @@ tasks {
         relocate("net.fabricmc.mappingio", "org.incendo.cloud.example.mappingio")
 
         mergeServiceFiles()
+        // Needed for mergeServiceFiles to work properly in Shadow 9+
+        filesMatching("META-INF/services/**") {
+            duplicatesStrategy = DuplicatesStrategy.INCLUDE
+        }
 
         manifest {
             attributes("paperweight-mappings-namespace" to "mojang")

examples/example-paper/build.gradle.kts

@@ -37,6 +37,10 @@ tasks {
         relocate("net.fabricmc.mappingio", "org.incendo.cloud.example.mappingio")
 
         mergeServiceFiles()
+        // Needed for mergeServiceFiles to work properly in Shadow 9+
+        filesMatching("META-INF/services/**") {
+            duplicatesStrategy = DuplicatesStrategy.INCLUDE
+        }
 
         manifest {
             attributes("paperweight-mappings-namespace" to "mojang")