Support `CallExpression`

You can parse TemplateLiteral string used as argument in a CallExpression.
The callee's name must be whitelisted, the default config accepts ctl aka the tiny utility classnames-template-literals from netlify.

You can specify one or more callee names by setting the callees option which expects an array of strings.

Only works for the classnames-order rule for now

FIXES

• [BUG] Single quotes are replaced by double quotes #4

MINOR

• Formatted code using Prettier
• Refact
• schema meta