[7.x. Stage 1] add new exception (UnconfirmedInvalid)

[rez1dent3]

No description provided.

[codecov]

Codecov Report

Merging #369 (d696e61) into master (ab9129e) will not change coverage.
The diff coverage is 100.00%.

❗ Current head d696e61 differs from pull request most recent head 26b4ce6. Consider uploading reports for the commit 26b4ce6 to get more accurate results

@@             Coverage Diff             @@
##              master      #369   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       255       255           
===========================================
  Files             26        26           
  Lines            860       860           
===========================================
  Hits             860       860           

Impacted Files	Coverage Δ
src/Traits/CanConfirm.php	100.00% <100.00%> (ø)

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