chore: bump to v0.4.0

Author: WipeAir

build.gradle.kts

@@ -13,7 +13,7 @@ allprojects {
 
 subprojects {
     group = "com.auritylab.graphql-kotlin-toolkit"
-    version = "0.3.4-SNAPSHOT"
+    version = "0.4.0"
 
     apply(plugin = "org.jlleitschuh.gradle.ktlint")
     apply(plugin = "org.jetbrains.dokka")