Update gradle and bintray plugins

Author: rubensousa

build.gradle

@@ -5,8 +5,8 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.7.3'
+        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.0'
     }
 }