Adding --numbers flag

[StopThatTalace]

Hello ! Here's my PR for issue #5

Description

Adding a feature to add random numbers to our wordlist. This is responding to the issue #5

Fixes # (issue)

Type of change

• [+] New feature
• [+] This change requires a documentation update

How Has This Been Tested?

Locally, with no version/dependencies update at all.

• [+] Test A : Only with --numbers flag cmd : passfinder company -n passfinder --numbers

• [+] Test B : With --numbers and --numbers-range flags // default value of range = 20 cmd : passfinder company -n passfinder --numbers --numbers-range 101

output :

passfinder
passfinder31
[...]
passfinder87

Checklist:

• [+] My code follows the style guidelines of this project
• [+] I have performed a self-review of my code
• [+] I have commented my code, particularly in hard-to-understand areas
• [+] My changes generate no new warnings

Hope this help !

[QU35T-code]

Hey @StopThatTalace,

Thanks for this PR, will review a bit later. Can you add basic tests in the company_test.go file ?

Also I changed the base branch to dev.

[QU35T-code]

Thanks @StopThatTalace !

Merge now