start to use more unified way of scripts organization

tgbotapi.utils/build.gradle

@@ -1,73 +1,18 @@
-buildscript {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-        classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
-    }
-}
-
 plugins {
     id "org.jetbrains.kotlin.multiplatform"
     id "org.jetbrains.kotlin.plugin.serialization"
 }
 
-project.version = "$library_version"
-project.group = "$library_group"
 project.description = "Additional extensions for core part of tgbotapi"
 
-apply from: "../publish.gradle"
-
-repositories {
-    mavenLocal()
-    mavenCentral()
-}
+apply from: "$mppProjectWithSerializationPresetPath"
 
 kotlin {
-    jvm {
-        compilations.main {
-            kotlinOptions {
-                jvmTarget = "1.8"
-            }
-        }
-    }
-    js(IR) {
-        browser()
-        nodejs()
-    }
-
     sourceSets {
         commonMain {
             dependencies {
-                implementation kotlin('stdlib')
                 api project(":tgbotapi.core")
             }
         }
-
-        commonTest {
-            dependencies {
-                implementation kotlin('test-common')
-                implementation kotlin('test-annotations-common')
-            }
-        }
-        jvmTest {
-            dependencies {
-                implementation kotlin('test-junit')
-            }
-        }
-        jsTest {
-            dependencies {
-                implementation kotlin('test-junit')
-                implementation kotlin('test-js')
-            }
-        }
     }
 }
-
-java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
-}