Static analysis reveals few errors

```
------ -----------------------------------------------------------------------------------------------------------
Line SniffHelpers.php
------ -----------------------------------------------------------------------------------------------------------
49 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findPrevious() expects array|int, string given.
53 Parameter #3 $end of method PHP_CodeSniffer\Files\File::findPrevious() expects int|null, int|true given.
67 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
75 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
83 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
90 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
101 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
------ -----------------------------------------------------------------------------------------------------------

------ ----------------------------------------------------------------------------------------------------------------------------------
Line Sniffs/Conditions/DisallowConditionAssignWithoutConditionalSniff.php
------ ----------------------------------------------------------------------------------------------------------------------------------
10 Method NeutronStandard\Sniffs\Conditions\DisallowConditionAssignWithoutConditionalSniff::register() should return array but
returns array.
22 Parameter #1 $types of method PHP_CodeSniffer\Files\File::findNext() expects array|int, string given.
------ ----------------------------------------------------------------------------------------------------------------------------------

------ --------------------------------------------------------------------------------------------------------------------------------
Line Sniffs/Functions/TypeHintSniff.php
------ --------------------------------------------------------------------------------------------------------------------------------
11 Method NeutronStandard\Sniffs\Functions\TypeHintSniff::register() should return array but returns array.
------ --------------------------------------------------------------------------------------------------------------------------------

------ -------------------------------------------------------------------------------------------------------------------------------------
Line Sniffs/Whitespace/RequireParenthesisSpacingSniff.php
------ -------------------------------------------------------------------------------------------------------------------------------------
11 Method NeutronStandard\Sniffs\Whitespace\RequireParenthesisSpacingSniff::register() should return array but returns array.
------ -------------------------------------------------------------------------------------------------------------------------------------
```

Start with the reported lines in SniffHelpers.php, then inspect register() in the three listed sniff files and the PHP_CodeSniffer File::findNext()/findPrevious() calls. Run the static-analysis check to reproduce the report; done means these reported type errors are resolved and the check passes.

Written by the indexing model from the issue text.