add cli handling

[regevbr]

No description provided.

[regevbr]

@ynahmany please take #4 under consideration as well when you plan the code design

[regevbr]

We also need to be able to support config files (rc and json) as cli options can be very long

[regevbr]

I think it will also be handy to have a sub command like yarn init that will interactively let you build your config file

[regevbr]

@ynahmany https://github.com/arcanis/clipanion seems like a cool library that is used by yarn

[regevbr]

we need to support pretty much the same flags as https://github.com/tjunnone/npm-check-updates
for example

• global packages only
• type of dependencies prod|dev|peer|optional
• specifying the package json location (if not default to cwd)
• getting configurations from yml file
• control concurrency of checks
• filter to check a list of deps to check and or regex
• filter to exclude a list of deps to check and or regex
• interactive mode
• control log level
• specify custom npm registry (global and per scope)
• control if we should use yarn or npm
• silent mode
• timeout
• show version