Update composer packages and use new PHPUnit TestCase class.

Author: noplanman

composer.json

@@ -19,11 +19,11 @@
     ],
     "require": {
         "php": "^7.0",
-        "longman/telegram-bot": "^0.40"
+        "longman/telegram-bot": "^0.42"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.5",
-        "jakub-onderka/php-parallel-lint": "^0.9"
+        "jakub-onderka/php-parallel-lint": "^0.9.2",
+        "phpunit/phpunit": "^6.1"
     },
     "autoload": {
         "psr-4": {