* [PHP] Tweak type-hint performance

This commit adjusts type hint implementation to avoid some redundant
lookaheads once a type hint context is on stack.

The new test case is meant to ensure not to break reference operator
precedence in function parameter lists as this is the only change in
behavior this commit includes.

Benchmark:

10k lines of:

   function unionTypeFunction(int | string $param0, Foo | \Foo\Bar | ?int $param1, Foo|\Foo\Bar|?int $param2, (?A|B)&(C|?D)&?E $param2, string $param3, $param4): Foo|\Foo\Bar|?int|static {}

Result:

   -5% parsing time

* [PHP] Tweak property type hints

This commit simplifies patterns needed to handle property type hints.

Properties begin with at least one visibility or type modifier
optionally followed by a type hint. The `type-hint` context is used by
`property-type-hints` only. The complicated lookahead pattern is not
needed in this use case.

Benchmark:

10k lines of:

    readonly $var = 0; public int | string $param0; public Foo | \Foo\Bar | ?int $param1; public Foo|\Foo\Bar|?int $param2; public (?A|B)&(C|?D)&?E $param2; public string $param3; public $param4;

Result:

   -4% parsing time

* [PHP] Tweak function parameter type-hints

This commit...

1. improves behavior with regards to incomplete type-hints to limit
   escalation of broken syntax highlighting.
2. improves performance of function parameter lists

Benchmark:

10k lines of:

   function unionTypeFunction(int | string $param0, Foo | \Foo\Bar | ?int $param1, Foo|\Foo\Bar|?int $param2, (?A|B)&(C|?D)&?E $param2, string $param3, $param4): Foo|\Foo\Bar|?int|static {}

Result:

   -10% parsing time

* [PHP] Optimize type-hints in catch expression

This commit applies new type-hint strategy to `catch(<type> $e)`
statements to get rid of `type-hints` context.