Upgrade dependencies fix PHPCS

CHANGELOG.md

@@ -9,13 +9,15 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 - Allow passing absolute file path for InputFile fields, instead of `Request::encodeFile($path)`.
 ### Changed
 - All Message field types dynamically search for an existing Command class that can handle them.
+- Upgrade dependencies.
 ### Deprecated
 - Botan.io service has been discontinued.
 - Most built-in System Commands will be handled by GenericmessageCommand by default in a future release and will require a custom implementation.
 ### Removed
 ### Fixed
 - Constraint errors in `/cleanup` command.
 - Return correct objects for requests.
+- PHPCS: static before visibility declaration.
 ### Security
 
 ## [0.55.1] - 2019-01-06

composer.json

@@ -28,12 +28,12 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "monolog/monolog": "^1.23",
+        "monolog/monolog": "^1.24",
         "guzzlehttp/guzzle": "^6.3"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8|^5.7|^6.5|^7.4",
-        "squizlabs/php_codesniffer": "^3.3"
+        "phpunit/phpunit": "^4.8|^5.7|^6.5|^7.4|^8.1",
+        "squizlabs/php_codesniffer": "^3.4"
     },
     "autoload": {
         "psr-4": {

src/DB.php

@@ -31,28 +31,28 @@ class DB
      *
      * @var array
      */
-    static protected $mysql_credentials = [];
+    protected static $mysql_credentials = [];
 
     /**
      * PDO object
      *
      * @var PDO
      */
-    static protected $pdo;
+    protected static $pdo;
 
     /**
      * Table prefix
      *
      * @var string
      */
-    static protected $table_prefix;
+    protected static $table_prefix;
 
     /**
      * Telegram class object
      *
      * @var Telegram
      */
-    static protected $telegram;
+    protected static $telegram;
 
     /**
      * Initialize