php 7.2 compatibility?

found these warnings when i ran a pre-upgrade compatibility check on my site’s plugins:

FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/ResourceIteratorInterface.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/ResourceIteratorFactoryInterface.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/ResourceIterator.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/AbstractResourceIteratorFactory.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/ResourceIteratorApplyBatched.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/MapResourceIteratorFactory.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/CompositeResourceIteratorFactory.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/ResourceIteratorClassFactory.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Mail/sendgrid-php-3.2.0/vendor/guzzle/guzzle/src/Guzzle/Service/Resource/Model.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3 | WARNING | ‘resource’ is a soft reserved keyword as of PHP version 7.0 and should not be used to name a class, interface or trait or as part of a namespace (T_NAMESPACE)
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Connectivity-Test/registered-domain-libs-master/generateEffectiveTLDs.php
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FOUND 2 ERRORS AFFECTING 2 LINES
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153 | ERROR | Function split() is deprecated since PHP 5.3 and removed since PHP 7.0; Use preg_split() instead
179 | ERROR | Function split() is deprecated since PHP 5.3 and removed since PHP 7.0; Use preg_split() instead
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FILE: /nas/content/live/adaptify/wp-content/plugins/postman-smtp/Postman/Postman-Configuration/PostmanSmtpDiscovery.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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87 | WARNING | Function each() is deprecated since PHP 7.2; Use a foreach loop instead
96 | WARNING | Function each() is deprecated since PHP 7.2; Use a foreach loop instead
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Can you let me know if it’s safe to upgrade to php 7.2?

Cheers!