WIP/POC - Add database migrations capability using Phinx.

CHANGELOG.md

@@ -5,6 +5,7 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 
 ## [Unreleased]
 ### Added
+- Database migrations using [Phinx].
 ### Changed
 ### Deprecated
 ### Removed
@@ -280,6 +281,7 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 [0.45.0-bc-up-download-directory]: https://github.com/php-telegram-bot/core/wiki/Breaking-backwards-compatibility#up-download-directory
 [0.44.0-bc-update-content-type]: https://github.com/php-telegram-bot/core/wiki/Breaking-backwards-compatibility#update-getupdatecontent
 [example-bot]: https://github.com/php-telegram-bot/example-bot
+[Phinx]: https://github.com/cakephp/phinx
 
 [Unreleased]: https://github.com/php-telegram-bot/core/compare/master...develop
 [0.57.0]: https://github.com/php-telegram-bot/core/compare/0.56.0...0.57.0

composer.json

@@ -29,7 +29,8 @@
         "ext-json": "*",
         "ext-mbstring": "*",
         "monolog/monolog": "^1.24",
-        "guzzlehttp/guzzle": "^6.3"
+        "guzzlehttp/guzzle": "^6.3",
+        "robmorgan/phinx": "^0.9|^0.10"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8|^5.7|^6.5|^7.5|^8.1",