Merge release v0.21.0

[lidel]

Finishing #622

[codecov]

Codecov Report

Attention: Patch coverage is 63.57143% with 51 lines in your changes missing coverage. Please review.

Project coverage is 59.87%. Comparing base (980447e) to head (9555624).
Report is 8 commits behind head on main.

@@            Coverage Diff             @@
##             main     #624      +/-   ##
==========================================
+ Coverage   59.83%   59.87%   +0.04%     
==========================================
  Files         239      238       -1     
  Lines       29961    29984      +23     
==========================================
+ Hits        17928    17954      +26     
+ Misses      10419    10414       -5     
- Partials     1614     1616       +2     

Files	Coverage Δ
...ernal/providerquerymanager/providerquerymanager.go	89.73% <100.00%> (+0.93%)	⬆️
bitswap/client/internal/session/session.go	91.53% <100.00%> (+0.48%)	⬆️
routing/http/contentrouter/contentrouter.go	50.56% <63.15%> (+1.42%)	⬆️
examples/car-file-fetcher/main.go	38.88% <38.88%> (ø)

... and 12 files with indirect coverage changes