Enforce native types for PHP 7.4+

Incorporating changes to our tests.

Makefile

@@ -1,15 +1,19 @@
 .PHONY: test test-report test-fix
 
+PHP_74_OR_NEWER=`php -r "echo (int) version_compare(PHP_VERSION, '7.4', '>=');"`
+
 test: test-report test-fix
 
 test-report: vendor
-	@vendor/bin/phpcs `find tests/input/* | sort` --report=summary --report-file=phpcs.log; diff tests/expected_report.txt phpcs.log
-
+	@if [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply tests/php-compatibility.patch; fi
+	@vendor/bin/phpcs `find tests/input/* | sort` --report=summary --report-file=phpcs.log; diff tests/expected_report.txt phpcs.log; if [ $$? -ne 0 ] && [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply -R tests/php-compatibility.patch; exit 1; fi
+	@if [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply -R tests/php-compatibility.patch; fi
 
 test-fix: vendor
+	@if [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply tests/php-compatibility.patch; fi
 	@cp -R tests/input/ tests/input2/
-	@vendor/bin/phpcbf tests/input2; diff tests/input2 tests/fixed; if [ $$? -ne 0 ]; then rm -rf tests/input2/; exit 1; fi
-	@rm -rf tests/input2/
+	@vendor/bin/phpcbf tests/input2; diff tests/input2 tests/fixed; if [ $$? -ne 0 ]; then rm -rf tests/input2/ && if [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply -R tests/php-compatibility.patch; fi; exit 1; fi
+	@rm -rf tests/input2/ && if [ $(PHP_74_OR_NEWER) -eq 1 ]; then git apply -R tests/php-compatibility.patch; fi
 
 vendor: composer.json
 	composer update

lib/Doctrine/ruleset.xml

@@ -349,7 +349,6 @@
     </rule>
     <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint">
         <properties>
-            <property name="enableNativeTypeHint" value="false"/>
             <property name="traversableTypeHints" type="array">
                 <element value="Traversable"/>
                 <element value="Iterator"/>

tests/php-compatibility.patch

@@ -0,0 +1,67 @@
+diff --git a/tests/expected_report.txt b/tests/expected_report.txt
+index 855edfd..5653a39 100644
+--- a/tests/expected_report.txt
++++ b/tests/expected_report.txt
+@@ -12,7 +12,7 @@ tests/input/constants-var.php                         4       0
+ tests/input/doc-comment-spacing.php                   10      0
+ tests/input/duplicate-assignment-variable.php         1       0
+ tests/input/EarlyReturn.php                           6       0
+-tests/input/example-class.php                         45      0
++tests/input/example-class.php                         48      0
+ tests/input/forbidden-comments.php                    8       0
+ tests/input/forbidden-functions.php                   6       0
+ tests/input/inline_type_hint_assertions.php           7       0
+@@ -32,15 +32,15 @@ tests/input/superfluous-naming.php                    11      0
+ tests/input/test-case.php                             8       0
+ tests/input/trailing_comma_on_array.php               1       0
+ tests/input/traits-uses.php                           11      0
+-tests/input/type-hints.php                            4       0
++tests/input/type-hints.php                            5       0
+ tests/input/UnusedVariables.php                       1       0
+ tests/input/use-ordering.php                          1       0
+ tests/input/useless-semicolon.php                     2       0
+ tests/input/UselessConditions.php                     20      0
+ ----------------------------------------------------------------------
+-A TOTAL OF 290 ERRORS AND 0 WARNINGS WERE FOUND IN 34 FILES
++A TOTAL OF 294 ERRORS AND 0 WARNINGS WERE FOUND IN 34 FILES
+ ----------------------------------------------------------------------
+-PHPCBF CAN FIX 229 OF THESE SNIFF VIOLATIONS AUTOMATICALLY
++PHPCBF CAN FIX 233 OF THESE SNIFF VIOLATIONS AUTOMATICALLY
+ ----------------------------------------------------------------------
+
+
+diff --git a/tests/fixed/example-class.php b/tests/fixed/example-class.php
+index 195d963..a2ee5c8 100644
+--- a/tests/fixed/example-class.php
++++ b/tests/fixed/example-class.php
+@@ -24,14 +24,12 @@ class Example implements IteratorAggregate
+ {
+     private const VERSION = PHP_VERSION - (PHP_MINOR_VERSION * 100) - PHP_PATCH_VERSION;
+
+-    /** @var int|null */
+-    private $foo;
++    private ?int $foo = null;
+
+     /** @var string[] */
+-    private $bar;
++    private array $bar;
+
+-    /** @var bool */
+-    private $baz;
++    private bool $baz;
+
+     /** @var ControlStructureSniff|int|string|null */
+     private $baxBax;
+diff --git a/tests/fixed/type-hints.php b/tests/fixed/type-hints.php
+index a1b1827..fb7d406 100644
+--- a/tests/fixed/type-hints.php
++++ b/tests/fixed/type-hints.php
+@@ -10,7 +10,7 @@ use Traversable;
+ class TraversableTypeHints
+ {
+     /** @var Traversable */
+-    private $parameter;
++    private Traversable $parameter;
+
+     /**
+      * @param Iterator $iterator