Update build.gradle (#471)

Author: doilio

build.gradle

@@ -45,11 +45,11 @@ buildscript {
 }
 
 dependencies {
-  compile 'com.sendgrid:java-http-client:4.1.0'
-  compile 'com.fasterxml.jackson.core:jackson-core:2.9.9'
-  compile 'com.fasterxml.jackson.core:jackson-annotations:2.9.9'
-  compile 'com.fasterxml.jackson.core:jackson-databind:2.9.9'
-  testCompile group: 'junit', name: 'junit', version: '4.12'
+  implementation 'com.sendgrid:java-http-client:4.1.0'
+  implementation 'com.fasterxml.jackson.core:jackson-core:2.9.9'
+  implementation 'com.fasterxml.jackson.core:jackson-annotations:2.9.9'
+  implementation 'com.fasterxml.jackson.core:jackson-databind:2.9.9'
+  testImplementation group: 'junit', name: 'junit', version: '4.12'
 }
 
 repositories {