vimeo/psalm 4.6.2 on PHP Packagist

@weirdan fixed a notice (#5255)
@spyric fixed line references in the CodeClimate output (#5262)
@elnoro limited incidence of the UnresolvableInclude after an is_file check
@orklah improved the error message when new PHP syntax cannot be understood when analysing older PHP code (#5268)
@orklah improved the signature map for session_id (#5272)
$unknown_object::someMethod() calls are no longer prohibited (#5257)
more static returns are interpreted as self in the case of final classes/methods (#5244)
fixed interpretation of parent::foo() inside traits (#5264)
fix reconciliation of classes with interfaces (#5236)
@boesing fixed an unnecessary ConfigException (#5280)
fix an issue when properties aren't being memoised after calls (#5231)
improve handling of get_class($templated_var) (#5279)
expand out templated params that cannot be inferred in new calls (#5229)

Internals

@joehoyle, @Nyholm and @elnoro improved the documentation
@weirdan and added a general error handler in (#5260) that converts notices/warnings to exceptions