prefer-unquoted-property-names linter rule incorrectly flags keywords

[anthony-c-martin]

The following is valid Bicep:

var test = {
  'null': 'asdf'
  'true': 'asdf'
  'false': 'asdf'
}

This linter rule tries to encourage the following, which is invalid Bicep:

var test = {
  null: 'asdf'
  true: 'asdf'
  false: 'asdf'
}

Similar issue with property access:

var foo = [
  test['null']
  test['true']
  test['false']
]

Is converted to:

var foo = [
  test.null
  test.true
  test.false
]

The decompiler also generates incorrect code for this