added buildscript

Author: Wicpar

build.gradle

@@ -1,5 +1,15 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.61"
+    }
+}
+
 plugins {
-    id 'org.jetbrains.kotlin.jvm' version '1.3.61'
+    id "org.jetbrains.kotlin.jvm" version "1.3.61"
 }
 
 group 'com.papsign.ktor'