VarSetType rename to SetVarType, add phan/phpstan/phpunit tests

Breaking change:
VarSetType/VarSetTypeNull classes have been renamed to
SetVarType/SetVarTypeNull

Added phan/phpstan static checkes and settings
Add phpunit tests (in test/phpunit) that are an exact copy from the
trunk folder unit tests

The phan/phpstan tests have been updated to work with the composer layout

config files with static defines needed for certain classes are stored
in test/configs (config.php, config.other.php, config.master.php)

ReadMe.md

@@ -4,7 +4,10 @@ This is just the lib/CoreLibs folder in a composer package.
 
 For local install only
 
-**Note**: for Template\SmartyExtended the `egrajp/smarty-extended` has to be installed
+**Note**: for following classes the `egrajp/smarty-extended` has to be installed
+
+- Template\SmartyExtended
+- Admin\EditBase
 
 ## Setup from central composer