remove strftime as it is deprecated as of php 8.1

fix obfuscation of Label: goto Label;

fix issues with anonymous classes & return type declarations

fix issue with defined() function

php 7.4 compatibility : string offset access syntax with curly braces…

… is deprecated

php 7.4 compatibility : string offset access syntax with curly braces…

… is deprecated

fix bug with use without alias

update scrambler version

cannot detect of which type an alias is by analysing the ast...

so merged function and classes scramble names.
both or none has to be obfuscated if an alias is used.

php 7.4 compatibility : fn is now a reserved keyword