[Gradle, JS] Fix escaped characters in package.json

^KT-40202 fixed

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

@@ -60,6 +60,7 @@ fun makeNodeModule(
 
     val gson = GsonBuilder()
         .setPrettyPrinting()
+        .disableHtmlEscaping()
         .create()
 
     files(dir)

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

@@ -81,6 +81,7 @@ class PackageJson(
     fun saveTo(packageJsonFile: File) {
         val gson = GsonBuilder()
             .setPrettyPrinting()
+            .disableHtmlEscaping()
             .addSerializationExclusionStrategy(
                 object : ExclusionStrategy {
                     override fun shouldSkipField(f: FieldAttributes?): Boolean =