Move to TS. Add some new props. Rewrite as a functional component

[MikeSha]

1. Adds new props on updates existing

• values string | string[] default values
• placeholder string | string[] [] input placeholder. If string, the one placeholder will be added to all inputs
• inputClassNames string | string[] [] input classnames. If string, the one class will be added to all inputs
• disabled boolean false disables all inputs
• required boolean false sets all inputs to be required
• id string undefined adds id prefix to all inputs. If id is not defined, id of each input won't be defined either
• loadingComponent JSX.Element Loader custom loader component

2. Loader now can be a custom component

3. Everything is rewritten on TypeScript as a functional component

4. Tests

5. Packages are updated

@suweya Apologies for not asking your opinion on TypeScript. The reason is simply a lack of time. My current project is written on TS and had to change some things in the original code. I simply not sure if I have any time to write it on JS. No worries if this PR will be declined.

[benmotyka]

great pr, unfortunately author of this lib is not active anymore