[Gradle, JS] Hack for GSON to get non-null values

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/PackageJson.kt

@@ -29,11 +29,26 @@ class PackageJson(
 
     var workspaces: Collection<String>? = null
 
+    // Gson set nulls reflective no matter on default values and non-null types
+    @Suppress("USELESS_ELVIS")
     val devDependencies = mutableMapOf<String, String>()
+        get() = field ?: mutableMapOf()
+
+    @Suppress("USELESS_ELVIS")
     val dependencies = mutableMapOf<String, String>()
+        get() = field ?: mutableMapOf()
+
+    @Suppress("USELESS_ELVIS")
     val peerDependencies = mutableMapOf<String, String>()
+        get() = field ?: mutableMapOf()
+
+    @Suppress("USELESS_ELVIS")
     val optionalDependencies = mutableMapOf<String, String>()
+        get() = field ?: mutableMapOf()
+
+    @Suppress("USELESS_ELVIS")
     val bundledDependencies = mutableListOf<String>()
+        get() = field ?: mutableListOf()
 
     companion object {
         fun scopedName(name: String): ScopedName = if (name.contains("/")) ScopedName(