Adds promo code to the state

[NejcZdovc]

Resolves #13082

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Test Plan:

make sure that when doing update check we are sending ref with it

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[codecov-io]

Codecov Report

Merging #13083 into master will increase coverage by 0.02%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master   #13083      +/-   ##
==========================================
+ Coverage   56.29%   56.31%   +0.02%     
==========================================
  Files         280      280              
  Lines       27568    27581      +13     
  Branches     4494     4497       +3     
==========================================
+ Hits        15520    15533      +13     
  Misses      12048    12048

Flag	Coverage Δ
#unittest	56.31% <80%> (+0.02%)	⬆️

Impacted Files	Coverage Δ
js/actions/appActions.js	19.78% <ø> (ø)	⬆️
app/updater.js	26.31% <0%> (ø)	⬆️
app/browser/api/ledger.js	57.09% <100%> (+0.24%)	⬆️
app/browser/reducers/ledgerReducer.js	46.92% <50%> (+0.13%)	⬆️

[bsclifton]

++ LGTM 😄

[bsclifton]

++

[NejcZdovc]

master 46a3b05
0.22 034ced2
0.21 efe6957
0.20 cc363a9

[diracdeltas]

lgtm