Update CONTRIBUTING.md

Author: aawnu

CONTRIBUTING.md

@@ -5,11 +5,11 @@ Thank you for being interesting in this package and wanting to contribute to it.
 ## Coding
 
 New code should be introduced to the codebase through issues that specify what you are trying to accomplish.
-I understand that sometimes you need add/update/delete code otherwhere in the codebase to achieve this goal.
+I understand that sometimes you need to add/update/delete code otherwhere in the codebase to achieve this goal.
 This is why my test always merges master in to ensure that your code stays functional/executable during development.
 
 Please adhere these pointers:
-* Support selected PHP Verisons | Ref: [Master/Composer.json](https://github.com/AlexWestergaard/php-ga4/blob/master/composer.json)
+* Support selected PHP Versions | Ref: [Master/Composer.json](https://github.com/AlexWestergaard/php-ga4/blob/master/composer.json)
 * Pass current tests without modification; unless clearly explaining why the change is necessary/required | `> vendor/bin/phpunit`
 * PHPUnit tests should confidently ensure that code doesn't fail/error in unwated ways (eg. E_WARNINGS or missing paranthesis)
 * At least try to follow PSR<1, 4, 12> and \*PSR<5, 10> for documentation | Ref: [PHP FIG.](https://www.php-fig.org/psr/)