Make $emailAddress on TypeException to be evaluated

[yehudah]

• [X ] I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• [X ] I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the development branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

Change the exception message from single quotes to double quotes so the user will know which email address failed.

[yehudah]

There is another issue on the code flow, that I didn't have the time to check.

I have this code:

$bccEmails = array();
foreach ( ( array ) $message->getBccRecipients() as $recipient ) {
                $recipient->log($this->logger, 'Bcc');
                $bccEmails[] = new \SendGrid\Mail\Bcc( $recipient->getEmail(), $recipient->getName() );
}
$email->addBccs($bccEmails);

By mistake instead, to call The Bcc class I called the Cc class, which caused the $emailAddress to be SendGridMailCc Object and not a string like the documentation says.

[thinkingserious]

Hello @yehudah,

Thanks again for the PR!

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[thinkingserious]

Hello @yehudah,

Thank you for the PR!

With regards to your second issue with respect to code flow, I'm not quite sure I follow. What is the expected result?

With Best Regards,

Elmer

[rvitaliy]

keep attention if a $emailAddress is not a string and it's can't be converto to string this generate a php error!
if you need to cast this value to string, probably the best choise is do something like: https://github.com/webmozart/assert/blob/master/src/Assert.php#L1145