drop support for QUIC draft version 32 and 34

[marten-seemann]

No description provided.

[codecov]

Codecov Report

Merging #3217 (f51cc93) into master (fa2e797) will increase coverage by 0.04%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master    #3217      +/-   ##
==========================================
+ Coverage   85.41%   85.45%   +0.04%     
==========================================
  Files         133      133              
  Lines        9792     9779      -13     
==========================================
- Hits         8363     8356       -7     
+ Misses       1057     1051       -6     
  Partials      372      372              

Impacted Files	Coverage Δ
internal/protocol/version.go	94.29% <0.00%> (-0.59%)	⬇️
http3/server.go	69.40% <100.00%> (+1.17%)	⬆️
internal/handshake/initial_aead.go	100.00% <100.00%> (ø)
internal/handshake/retry.go	75.00% <100.00%> (ø)
internal/handshake/tls_extension_handler.go	100.00% <100.00%> (ø)

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