Update to latest ipld before rework

[hannahhoward]

Updates various deps and update code to accommodate, moves off special UnixFS commit

[codecov]

Codecov Report

Merging #2 into master will increase coverage by 1.95%.
The diff coverage is 40.36%.

@@            Coverage Diff             @@
##           master       #2      +/-   ##
==========================================
+ Coverage   22.22%   24.16%   +1.95%     
==========================================
  Files           6        6              
  Lines        1247     1279      +32     
==========================================
+ Hits          277      309      +32     
+ Misses        931      930       -1     
- Partials       39       40       +1     

Impacted Files	Coverage Δ
raw_node_gen.go	12.13% <0.00%> (ø)
pb_node_gen.go	18.91% <17.29%> (+1.21%)	⬆️
coding.go	80.83% <100.00%> (+5.39%)	⬆️
node_builder_chooser.go	83.34% <100.00%> (ø)

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