upgrade deps

[jkralik]

github.com/pion/dtls/v2 v2.0.13
golang.org/x/net v0.0.0-20211216030914-fe4d6282115f

[codecov-commenter]

Codecov Report

Merging #267 (e07f393) into master (f07411c) will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #267      +/-   ##
==========================================
- Coverage   63.91%   63.79%   -0.13%     
==========================================
  Files          79       79              
  Lines        5640     5640              
==========================================
- Hits         3605     3598       -7     
- Misses       1678     1684       +6     
- Partials      357      358       +1     

Impacted Files	Coverage Δ
net/conn.go	85.24% <0.00%> (-1.64%)	⬇️
tcp/session.go	70.77% <0.00%> (-1.37%)	⬇️
tcp/clientobserve.go	70.58% <0.00%> (-0.99%)	⬇️
tcp/clientconn.go	69.40% <0.00%> (-0.75%)	⬇️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information