v3: move to es6, remove old stuff

[fippo]

breaking changes:

• candidate.component is now a string rtp/rtcp instead of 1/2. See #26
• writeMediaSection is no more. See #30
• writeRtpDescription no longer adds a=rtcp-mux. See #46, use writeRtcpParameters
• writeIceParameters writes a=ice-lite, see #41. Note that writing ice-lite to media sections is violating the spec and rejected by Firefox

first commit follows https://github.com/otalk/rtcpeerconnection-jingle/pull/22

[codecov-io]

Codecov Report

Merging #70 into master will increase coverage by 6.43%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
+ Coverage   92.68%   99.11%   +6.43%     
==========================================
  Files           1        1              
  Lines         369      340      -29     
==========================================
- Hits          342      337       -5     
+ Misses         27        3      -24     

Impacted Files	Coverage Δ
sdp.js	99.11% <100.00%> (+6.43%)	:arrow_up:

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[fippo]

pondered moving to an es6 module but that isn't ready in node yet.

[fippo]

upstream tests with adapter :heavy_check_mark:

[fippo]

published as 3.0.0 with tag beta