Allow PHP 7 code to pass sniffs

[stracker-phil]

Currently, the ruleset.xml enforces compatibility with PHP 5.6.
However, Divi itself now requires PHP 7.4 (no recommendation, but requirement)
Also, Divi 4 makes good use of PHP 7 syntax throughout its codebase (sample: File "ChunkImagesTrait.php" uses type-hints for string, int, array)

Requested Change

Update the ruleset.xml to <config name="testVersion" value="7.0-"/> so we can use a few more modern syntax elements in our code.

Current code:

marketplace-phpcs/ruleset.xml

Line 8 in 154f622

<config name="testVersion" value="5.6-"/>

Related links

• Discord thread: https://discord.com/channels/1041765492907589683/1041765492907589686/1172190007243583678
• Divi requirements: https://www.elegantthemes.com/blog/divi-resources/divi-hosting-requirements

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Attached PR

• Updated ruleset testVersion to 7.0 and downgraded wp-coding-standards/wpcs to maximum compatible version #8