shellscript generators (src/generators) don't wrap variable values between proper quoting

[hbobenicio]

For example, ATM, this one: https://github.com/worldsibu/hurley/blob/develop/src/generators/cryptofilesgenerator.sh.ts

doesn't wrap the ROOT_DIR between double/single quotes:

ROOT_DIR=${join(__dirname, '../..')}

The side effect of this is that, for example, if your project is located in a directory that has spaces in its path then the hurl new fail with something like:

 [String: '']
  stdout: '',
  stderr: '/bin/bash: line 3: with: command not found\n',
  code: 127,
  cat: [Function: bound ],
  exec: [Function: bound ],
  grep: [Function: bound ],
  head: [Function: bound ],
  sed: [Function: bound ],
  sort: [Function: bound ],
  tail: [Function: bound ],
  to: [Function: bound ],
  toEnd: [Function: bound ],
  uniq: [Function: bound ] }
[hurley] - Found error while running script!
(node:25055) UnhandledPromiseRejectionWarning: Error: Errors found in script, stopping execution
    at Object.<anonymous> (/dir with space/myapp/node_modules/@worldsibu/hurley/dist/utils/sysWrapper.js:119:27

after moving the project to another directory that does not have spaces in its path then the command hurl new works as expected.