Handle error when value is not a string

[lulalala]

Describe the problem

I accidentally provided a hash {} as value, and this gives cryptic error:

Steps to reproduce the problem

prompt.ask("Foo?", value: {})

Actual behaviour

Foo? {}  (rib):18:in `main'
tty-prompt-0.23.1/lib/tty/prompt.rb:202:in `ask'
tty-prompt-0.23.1/lib/tty/prompt.rb:181:in `invoke_question'
tty-prompt-0.23.1/lib/tty/prompt/question.rb:110:in `call'
tty-reader-0.9.0/lib/tty/reader.rb:118:in `subscribe'
tty-prompt-0.23.1/lib/tty/prompt/question.rb:111:in `block in call'
tty-prompt-0.23.1/lib/tty/prompt/question.rb:121:in `render'
tty-prompt-0.23.1/lib/tty/prompt/question.rb:162:in `process_input'
tty-prompt-0.23.1/lib/tty/prompt/question.rb:178:in `read_input'
tty-reader-0.9.0/lib/tty/reader.rb:265:in `read_line'
tty-reader-0.9.0/lib/tty/reader.rb:344:in `clear_display'
tty-reader-0.9.0/lib/tty/reader/line.rb:256:in `size'
tty-reader-0.9.0/lib/tty/reader/line.rb:249:in `text_size'
tty-reader-0.9.0/lib/tty/reader/line.rb:18:in `sanitize'
NoMethodError: undefined method `gsub' for {}:Hash

Expected behaviour

I think there are a few ways this can be more friendly:

• Update the document to clarify String as the expected value
• If non-String is provided, maybe raise an error before user input

Describe your environment

• OS version: Mac OS X 12.4
• Ruby version: 2.7.6
• TTY::Prompt version: 0.23.1