Runtime expressions matched via Regex expressions are not properly unescaped #179

What happened:

Runtime expressions matched via Regex expressions are not properly unescaped.

As a matter of fact, when doing Regex-based processing of JSON to extract runtime expressions, results are not unescaped, resulting in a bad format exception in jq.

What you expected to happen:

Runtime expression to be properly unescaped.

How to reproduce it:

Use a runtime expression with escaped quotes as arguments of an OpenAPI operation, such as:

{
  "name": "EscapingTest",
  "functionRef":{
    "refName": "testOperation",
   "arguments":{
      "uniquePetName": "${ .pet.name + \"_\" + .pet.id }"
    }
  }
}