[BetterPhpDocParser] Use str_contains() for DoctrineAnnotationDecorator

[andrewnicols]

The Lexer tokenizes at whitespace and certain other characters such as ., and (, If none of these tokens are present then the tokens are not split. For example in the string here:

@copyright Some Value. Something.({@link https://example.com}).

This is tokenised into:

'@copyright'
' '
'Some'
' '
'Value'
'.'
' '
'Something'
.({@link'
' '
'https'
':'
'//example.com}).'

Both the open, and close, curly braces may be in the middle of a string and therefore the str_contains must be used for these cases.

[samsonasik]

Thank you @andrewnicols