Invalid canadian postal codes

[aarana-ix]

The logic used to generate canadian zipcodes is wrong. The current format mask is this: '?#? #?#'. However, not all letters are valid in all the positions, so calling bothify on that may return invalid postal codes.

Valid canadian postal codes should match this regexp: /^[A-CEGHJK-NPR-TVXY][0-9][A-CEGHJK-NPR-TV-Z] [0-9][A-CEGHJK-NPR-TV-Z][0-9]$/

If you wish, I will fork this repo and implement the necessary changes. I just wanted to open the issue to see if something like this would be merged, and to link the PR back to the issue for discussion.

[hmaack]

Hopefully @steveclarke knows more, he made the first implementation. 👍
It would be great if you could create a fix-branch and a PR if the postal codes are wrong generated. 🎁

[marocchino]

I will take this.