Accept gradle Terms of Service

Issue gh-94

build.gradle

@@ -22,6 +22,13 @@ allprojects {
 	}
 }
 
+if (hasProperty('buildScan')) {
+	buildScan {
+		termsOfServiceUrl = 'https://gradle.com/terms-of-service'
+		termsOfServiceAgree = 'yes'
+	}
+}
+
 repositories {
 	mavenCentral()
 }