Fix COFA validation for USStateField

[elliottcf]

The USPS codes for COFA states aren't in the STATES_NORMALIZED dictionary so they won't validate correctly in a USStateField form field.

I should have caught this in my previous PR, sorry.

[codecov-io]

Codecov Report

Merging #303 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #303   +/-   ##
=======================================
  Coverage   95.82%   95.82%           
=======================================
  Files         153      153           
  Lines        3878     3878           
  Branches      517      517           
=======================================
  Hits         3716     3716           
  Misses         98       98           
  Partials       64       64

Impacted Files	Coverage Δ
localflavor/us/us_states.py	100% <ø> (ø)	⬆️

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[benkonrath]

Is it possible or does it make sense to add some sort of test?

[elliottcf]

I'm not against it. If it checked that all fields in the dropdown validate, it would have caught this bug.

[benkonrath]

That sounds good. I'll cherry-pick this change to the 1.5.x branch as well.

[benkonrath]

This PR needs a test before it can be merged. Thanks.

[benkonrath]

@elliottcf Are you still interested in contributing this fix? If so, it would be great to get a test for this change so that I can merge it in. Thanks.

[elliottcf]

Yes, I am. I've just been busy with other things so I haven't gotten around to working on the tests you suggested.
I will try to get those written soon.

[benkonrath]

No problem, I know the feeling. :-) It would be nice to get this into the 2.0 release which I'm hoping to release before the end of the year (see #322). I can always add this fix for 2.0.x and 1.6.x if it doesn't make it into 2.0. Thanks for your help with this.

Adding a test for this change would need tests for all of STATES_NORMALIZED and this can be added in another PR if desired.