Feature Request: Option to keep use `|-` while using forceQuotes

[rinsuki]

personally I prefer to use quotes for string in YAML, rather than raw strings, to keep avoid confuses around number, like this:

app:
  version: 1.2.3 # => string
pg:
  version: 15.2 # => edited by human and now its number, but unexpected...

in js-yaml, this can be done with forceQuotes option for yaml.dump(), but this also disables |- syntax.

app:
  version: '1.2.3' # this is string, really clear
  startup: "#!/bin/bash\n# doing something\n# also doing something..." # ... hard to read

since | defines they are always string (like quotes does), it would be good to have option to also allow their (aka just simply disallows implicit string literal)

Expected Result:

app:
  version: '1.2.3'
  startup: |-
    #!/bin/bash
    # doing something
    # also doing something...