Fix AST::fromArray conversion of initial values (match initial to expected conversion)

[zimzat]

• Parse DirectiveDefinitionNode->locations as NodeList<NamedNode>
• Parse Parser::implementsInterfaces as NodeList<NamedTypeNode>
• Update signature of Parser::unionMemberTypes to match actual NodeList<NamedTypeNode>

Fixes #723

Note: I wasn't sure how to address the phpstan error so I updated the baseline. I can revisit this if necessary.

 ------ ----------------------------------------------------------------------- 
  Line   src/Validator/Rules/KnownDirectives.php                                
 ------ ----------------------------------------------------------------------- 
         Ignored error pattern #^Only booleans are allowed in a negated         
         boolean, array<string\>\|null given\.$# in path                        
         /home/zimzat/files/sources/graphql-php/src/Validator/Rules/KnownDirec  
         tives.php was not matched in reported errors.                          
  102    Only booleans are allowed in a negated boolean, array|null given.      
 ------ ----------------------------------------------------------------------- 

[coveralls]

Coverage decreased (-0.009%) to 86.3% when pulling f0b997d on zimzat:fix-directive-definition-locations-list-type into 4f34309 on webonyx:master.

[spawnia]

This makes the Parser more self-consistent, looks good to me.

[zimzat]

Thanks @spawnia. I removed instead of updated the @return because other places didn't have them and nothing was complaining, though I agree there's benefit in having them. 👍

[zimzat]

@spawnia It looks like phpcs marks those as duplicate information errors 😞

Should I remove them again, or is there something I could do in PHPCS to allow for them?

[spawnia]

Should I remove them again, or is there something I could do in PHPCS to allow for them?

Maybe we can fix that in the future, let's remove it for now to keep this PR focused.

[zimzat]

Done 👍 Thanks!

[vladar]

Thanks for the fix!