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

**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 :) 

