Authenticate in 'kotlin-dev' repo on Bintray

Author: Michael Kuzmin

build.gradle

@@ -51,7 +51,13 @@ buildscript {
     repositories {
         jcenter()
         maven { url "https://kotlin.bintray.com/kotlinx" }
-        maven { url "https://kotlin.bintray.com/kotlin-dev" }
+        maven {
+            url "https://kotlin.bintray.com/kotlin-dev"
+            credentials {
+                username = project.hasProperty('bintrayUser') ? project.property('bintrayUser') : System.getenv('BINTRAY_USER') ?: ""
+                password = project.hasProperty('bintrayApiKey') ? project.property('bintrayApiKey') : System.getenv('BINTRAY_API_KEY') ?: ""
+            }
+        }
         maven { url "https://kotlin.bintray.com/kotlin-eap" }
         maven { url "https://jetbrains.bintray.com/kotlin-native-dependencies" }
         maven { url "https://plugins.gradle.org/m2/" }
@@ -125,7 +131,13 @@ allprojects {
             google()
         }
         jcenter()
-        maven { url "https://kotlin.bintray.com/kotlin-dev" }
+        maven {
+            url "https://kotlin.bintray.com/kotlin-dev"
+            credentials {
+                username = project.hasProperty('bintrayUser') ? project.property('bintrayUser') : System.getenv('BINTRAY_USER') ?: ""
+                password = project.hasProperty('bintrayApiKey') ? project.property('bintrayApiKey') : System.getenv('BINTRAY_API_KEY') ?: ""
+            }
+        }
         maven { url "https://kotlin.bintray.com/kotlin-eap" }
         maven { url "https://kotlin.bintray.com/kotlinx" }
     }