PHP 8

.travis.yml

@@ -2,7 +2,6 @@ before_install:
   - git submodule update --init --recursive
 language: php
 php:
-  - 7.1
-  - 7.2
-  - 7.3
+  - 7.x
+  - 8.x
 script: phpunit tests/AllTests.php

lib/model/Tweet.php

@@ -35,7 +35,7 @@ public function __construct(array $array) {
 		$this->user = new User($array);
 	}
 
-	function jsonSerialize() {
+	function jsonSerialize(): array {
 		return [
 			'id'                    => $this->id,
 			'createdAt'             => $this->createdAt,
@@ -165,4 +165,4 @@ public function getUser() {
 	public function setUser(User $user) {
 		$this->user = $user;
 	}
-}
+}

lib/model/User.php

@@ -15,7 +15,7 @@ public function __construct(array $array) {
 		$this->screenName = $array['screen_name'];
 	}
 
-	public function jsonSerialize() {
+	public function jsonSerialize(): array {
 		return [
 			'id'                => $this->id,
 			'name'              => $this->name,
@@ -56,4 +56,4 @@ public function setScreenName($screenName) {
 		$this->screenName = $screenName;
 	}
 
-}
+}