[🙏] add a -v switch for snyk-api-import to show version of tool

[kevin-s31]

Describe the user need
I want Snyk to be able to tell me the version of snyk-api-import tool I'm using without having to compare against hash/checksum :)

Describe expected behaviour

snyk-api-import -v switch would ideally return the version of the tool being used

Additional context

Just something that would be nice to have :)