update scripts

build.gradle

@@ -1,27 +1,31 @@
 buildscript {
+    repositories {
+        jcenter()
+        google()
+        mavenCentral()
+        mavenLocal()
+        maven { url "https://plugins.gradle.org/m2/" }
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.0.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "org.jetbrains.kotlin:kotlin-serialization:$kotlin_version"
+        classpath "com.getkeepsafe.dexcount:dexcount-gradle-plugin:$dexcount_version"
+        classpath "com.github.breadmoirai:github-release:$github_release_plugin_version"
+        classpath "org.jetbrains.dokka:dokka-gradle-plugin:$dokka_version"
+    }
+}
+
+allprojects {
     repositories {
         mavenLocal()
         jcenter()
         mavenCentral()
+        google()
+        maven { url "https://kotlin.bintray.com/kotlinx" }
     }
 }
 
-repositories {
-    mavenLocal()
-    jcenter()
-    mavenCentral()
-    maven { url "https://kotlin.bintray.com/kotlinx" }
-}
-
-allprojects {
-    ext {
-        projectByName = { name ->
-            for (subproject in rootProject.subprojects) {
-                if (subproject.name == name) {
-                    return subproject
-                }
-            }
-            return null
-        }
-    }
-}
+apply from: "./extensions.gradle"
+apply from: "./github_release.gradle"