#404 - Add Arrow Key Assignment Operator Regex to Keyword Plugin

[jpdakran]

Problem:

• It was reported that hardcoded PHP passwords were not detected by the keyword plugin
• This is specific to the array constructor where elements are assigned like the following:
  array( key => value, key2 => value2, key3 => value3, ... )
• The problem here is the => operator does not have a corresponding regex in the keyword plugin

Solution:

• Added regex to catch secrets with form of password => "bar"
• This regex will require the secret keyword denylist followed by the => operator and lastly followed by a string wrapped in quotes
• This was added to the default grouping of QUOTES_REQUIRED_DENYLIST_REGEX_TO_GROUP which is a grouping of regexes for all file types that do not have specified overrides.