chore(deps): update to jwt v5, remove iat workaround

[ecrupper]

Can remove workaround introduced in #814

Update to ValidMethods struct — needs to be sourced from NewParser.

Tested with an iat set in the future, no used before issued error.

[codecov]

Codecov Report

Merging #821 (d5b6d4d) into main (54f3f61) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #821      +/-   ##
==========================================
- Coverage   57.75%   57.73%   -0.02%     
==========================================
  Files         263      263              
  Lines       15918    15911       -7     
==========================================
- Hits         9194     9187       -7     
  Misses       6310     6310              
  Partials      414      414              

Impacted Files	Coverage Δ
internal/token/mint.go	51.11% <ø> (ø)
router/middleware/auth/auth.go	100.00% <ø> (ø)
internal/token/parse.go	90.00% <100.00%> (-1.90%)	⬇️