rustfmt: Run on lightning-invoice

[tnull]

We run rustfmt on the lightning-invoice crate.

[codecov]

Codecov Report

Attention: Patch coverage is 93.03797% with 33 lines in your changes missing coverage. Please review.

Project coverage is 89.68%. Comparing base (4322b19) to head (b5b70e7).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
lightning-invoice/src/de.rs	88.30%	9 Missing and 11 partials ⚠️
lightning-invoice/src/lib.rs	95.59%	12 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3221      +/-   ##
==========================================
- Coverage   89.70%   89.68%   -0.02%     
==========================================
  Files         129      129              
  Lines      105437   105460      +23     
  Branches   105437   105460      +23     
==========================================
+ Hits        94582    94585       +3     
- Misses       8113     8130      +17     
- Partials     2742     2745       +3     

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[TheBlueMatt]

There's a lot going on in this crate right now for the bech32 upgrade, sadly, so I'm afraid this might want to wait :/

[tnull]

There's a lot going on in this crate right now for the bech32 upgrade, sadly, so I'm afraid this might want to wait :/

Yeah, I agree. Happy to rebase once the changes landed.

[tnull]

Rebased to resolve conflicts with main

[TheBlueMatt]

Blocked on #3270

[tnull]

Rebased after #3270 landed.

[tnull]

Rebased once more to address minor conflicts.

[TheBlueMatt]

Needs rebase again but the changes are mostly fine.

[tnull]

Rebased and addressed comments.