Escape backslashes in company names (and just in case, contact emails)

[alanhartless]

Q	A
Bug fix?	Y
New feature?
Automated tests included?	Y
Related user documentation PR URL
Related developer documentation PR URL
Issues addressed (#s or URLs)	#5249
BC breaks?
Deprecations?

Description:

If a company name has a backslash, the sync will fail with a SF SQL error.

Steps to reproduce the bug:

1. Create a company in Mautic where the name has a backslash in it
2. Setup SF sync per the documentation enabling push to integration and enable the Company object
3. Run the php app/console m:i:s -i Salesforce -a "5 min" command
4. Note the error

Steps to test this PR:

1. Run the command again the company should push to SF
2. Run the updated unit tests

[escopecz]

It does not fix the error for me after I check out this PR:

 [Mautic\PluginBundle\Exception\ApiErrorException]
  isDeleted = false and Name in ('back\slash')
                                ^
  ERROR at Row:1:Column:138
  Invalid string literal 'back\slash'. Illegal character sequence '\s' in string literal.

Clearing the cache and re-saving the SF plugin did not help.

[alanhartless]

Sorry to waste your time on this @escopecz. It's working now.

[escopecz]

The account got pushed now. Thanks Alan! 👍

[javjim]

Reproduced bug, and pr fixes this great job