Add Regex pattern testcases.

[bjompen]

I'm still missing patterns for the regex pattern tests for the following:

• _Cloudinary
• _Firebase_URL
• _Amazon_MWS_Auth_Token
• _Facebook_Access_Token
• _Facebook_OAuth
• _GitHub
• _Generic_API_Key
• _Generic_Secret
• _Google_API_Key
• _Google_Cloud_Platform_OAuth- :
• _Google_GCP_Service_account
• _Google_OAuth_Access_Token
• _Heroku_API_Key
• _MailChimp_API_Key
• _Mailgun_API_Key
• _Password_in_URL
• _PayPal_Braintree_Access_Token
• _Picatic_API_Key
• _Slack_Webhook
• _Stripe_API_Key
• _Stripe_Restricted_API_Key
• _Square_Access_Token
• _Square_OAuth_Secret
• _Twilio_API_Key
• _Twitter_Access_Token
• _Twitter_OAuth

If possible I wan't to be able to add matching patterns, and non matching patterns, but just the general look of these tokens are better than nothing.

Basically, all from the h33tlit list. If anyone has obfuscated patterns to share, please do so, or add them to the pattern testcases.