Fix set type in set & get commands ukko#31

- fix type if used serializer
- add new serializer constant
- fix formatting
- fix vars naming, from snake_case to camelCase
- fetch patches from https://github.com/JetBrains/phpstorm-stubs

Author: Maksim Kamashev

composer.json

@@ -14,7 +14,7 @@
         }
     ],
     "require":{
-        "php":">=5.3.0"
+        "php":">=7.0"
     },
     "autoload": {
         "psr-0": {