Release/v2.0.0

[marcwieland95]

Here we go. I went through all the issues we had. Solved them and cleaned up more issues.

Since we're adding PER Coding Style 2.0 (https://www.php-fig.org/per/coding-style/), it's a major release.
I ran it on a local project, and I could auto-fix all changes. The following rules had to be changed:

• PhpCsFixer\Fixer\Operator\ConcatSpaceFixer::class
• PhpCsFixer\Fixer\ControlStructure\TrailingCommaInMultilineFixer::class
• PhpCsFixer\Fixer\FunctionNotation\FunctionDeclarationFixer::class
• PhpCsFixer\Fixer\Basic\SingleLineEmptyBodyFixer::class
• PhpCsFixer\Fixer\Operator\NewWithParenthesesFixer::class
• PhpCsFixer\Fixer\ClassNotation\ClassDefinitionFixer::class

The updates @rugbymauri is working on with CS Fixer aren't ready yet, and I created a milestone for those adjustments. Once this is ready, we see if there's another major needed or if it's backwards compatible. For now, I want to release those adjustments to have a clean base again.

[rugbymauri]

the SymfonySet defines

'single_line_empty_body' => false, // overrides @PER-CS2.0

https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/src/RuleSet/Sets/SymfonySet.php#L206

our ECS config enforces it

[rugbymauri]

Same issuse

            'trailing_comma_in_multiline' => [
                'after_heredoc' => true,
                'elements' => [ // explicitly omit 'arguments'
                    'array_destructuring',
                    'arrays',
                    'match',
                    'parameters',
                ],
            ],

https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/src/RuleSet/Sets/SymfonySet.php#L219

our ECS enforces for 'arguments'