feat(isLicensePlate): add support for Swedish license plates

[elmaxe]

This PR adds support for Swedish license plates.

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)

[codecov]

Codecov Report

Merging #1665 (97f543a) into master (f055c11) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #1665   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          102       102           
  Lines         2072      2073    +1     
  Branches       472       472           
=========================================
+ Hits          2072      2073    +1     

Impacted Files	Coverage Δ
src/lib/isLicensePlate.js	100.00% <100.00%> (ø)

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[profnandaa]

LGTM. Please fix the merge conflict and we should be good to go.

[elmaxe]

@profnandaa Fixed the merge conflict

[tux-tn]

Hello @elmaxe and thank you for your PR. Can you please check my comments below?
In addition to that i have two more general feedbacks:

• Multiple white-spaces are considered a valid license plate. You should probably trim your string before passing it to the regex validation in order to prevent that.
• According to the wikipedia page of swedish license plates, a plate can't end with the Ocharacter to prevent it from being confused with 0, i don't see that exception in your regex, am i wrong?

[elmaxe]

• Multiple white-spaces are considered a valid license plate. You should probably trim your string before passing it to the regex validation in order to prevent that.

Fair!

• According to the wikipedia page of swedish license plates, a plate can't end with the Ocharacter to prevent it from being confused with 0, i don't see that exception in your regex, am i wrong?

Interestingly this is not on the Swedish wikipedia page, but it is correct (source)

[tux-tn]

LGTM 🎉 Thank you for taking the time to address my comments

[profnandaa]

LGTM, thanks! 🎉