0.19 Variable Map injection broken by replaceAll

[katesclau]

Describe the bug
replaceAll is not a supported function. We need to fall back to replace with RegExp.

TypeError: statmnt.replaceAll is not a function
    at .../node_modules/serverless-appsync-simulator/lib/data-loaders/RelationalDataLoader.js:129:20

To Reproduce
Create a Query on and RDS Data source with variableMap

{
  "version": "2018-05-29",
  "statements": [
    "SELECT :VALUE"
  ],
  "variableMap": {
      ":VALUE": "$ctx.args.value"
  }
}

Run it and watch it break.

Expected behavior
The query returns the value in the response $ctx.result

[katesclau]

Another solution to this, is upgrading to NodeJS >v15