Migrate to use ConnCtx

[at-wat]

Use Conn controlled by context.Context.
If you want to use net.Conn as a underlying connection, wrapping it by github.com/pion/transport/ctxconn.ConnCtx would be the easiest way.

[codecov]

Codecov Report

Merging #113 (b1366c3) into master (1354c92) will increase coverage by 0.07%.
The diff coverage is 95.23%.

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
+ Coverage   74.47%   74.54%   +0.07%     
==========================================
  Files          16       16              
  Lines         709      711       +2     
==========================================
+ Hits          528      530       +2     
  Misses        100      100              
  Partials       81       81              

Flag	Coverage Δ
go	74.54% <95.23%> (+0.07%)	⬆️
wasm	73.98% <85.71%> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
stream_srtcp.go	61.70% <80.00%> (ø)
session.go	73.46% <100.00%> (ø)
session_srtcp.go	76.19% <100.00%> (+0.28%)	⬆️
session_srtp.go	73.80% <100.00%> (+0.31%)	⬆️
stream_srtp.go	68.18% <100.00%> (ø)

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[at-wat]

failed to initialize build cache at /.cache/go-build: mkdir /.cache/go-build: permission denied
Error: Process completed with exit code 1.

on i386.
docker build -v dir -u uid creates dir as root but container is run as uid.

Will be fixed by pion/.goassets#54

[Sean-Der]

@at-wat mind starting /v2 for this? Since we are breaking public APIs

[at-wat]

@Sean-Der I think it's better to consider #9 before releasing v2.0.0.
Let's start v2.0.0-rc0.

[Sean-Der]

Works for me! I am somewhat hesitant to do more changes, I really want to release pion/webrtc v3. We have people building with v2 and it’s a decent support burden.