vimeo/psalm 4.5.2

Fix PHP 7.1-7.2 builds

on GitHub

4.5.0 introduced syntax incompatible with PHP 7.2, this fixes it – thanks to @drealecs, and @weirdan who prevented future regressions.

• fixes a possible infinite loop with some generic instantiation (#5211)
• adds completions for function names thanks to @joehoyle (#5128)
• allows @psalm-type to be used inside generics thanks to @leightonthomas (#5205)
• array_key_exists now behaves a little safer thanks to @brainlock (#5197)
• allow is_array check on a templated iterable (#5198)