MQE-1079: declare(strict_types=1) causes static code check failure

- Updated PHPCodeSniffer version + sniffs.
- Removed various @ignore flags in files and fixed errors

Author: KevinBKozan

bin/blacklist.txt

@@ -4,7 +4,6 @@
 # THIS FILE CANNOT CONTAIN BLANK LINES                            #
 ###################################################################
 bin/blacklist.txt
-dev/tests/static/Magento/Sniffs/Annotations/Helper.php
-dev/tests/static/Magento/Sniffs/Annotations/RequireAnnotatedAttributesSniff.php
-dev/tests/static/Magento/Sniffs/Annotations/RequireAnnotatedMethodsSniff.php
+dev/tests/static/Magento/Sniffs/Commenting/FunctionCommentSniff.php
+dev/tests/static/Magento/Sniffs/Commenting/VariableCommentSniff.php
 dev/tests/verification/_generated

composer.json

@@ -22,7 +22,7 @@
         "vlucas/phpdotenv": "^2.4"
     },
     "require-dev": {
-        "squizlabs/php_codesniffer": "1.5.3",
+        "squizlabs/php_codesniffer": "~3.2",
         "sebastian/phpcpd": "~3.0",
         "brainmaestro/composer-git-hooks": "^2.3",
         "doctrine/cache": "<1.7.0",