feat: throw error if API version is v3

[ddubrava]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Refactoring
• Build or CI related changes
• Documentation content changes

What is the current behavior?

No errors, if someone decides to pass 'v3' everything breaks.

What is the new behavior?

Now we provide an error that 'v3' is not supported.

Does this PR introduce a breaking change?

• Yes
• No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2376317) 98.47% compared to head (53e9408) 98.47%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #227   +/-   ##
=======================================
  Coverage   98.47%   98.47%           
=======================================
  Files          14       14           
  Lines         655      657    +2     
  Branches       71       72    +1     
=======================================
+ Hits          645      647    +2     
  Misses          4        4           
  Partials        6        6           

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