chore: Integrate scale package into lib/trie

[timwu20]

Changes

• Revise lib/trie/Hasher to become private
• Update scale integration in lib/trie/hash.go

Tests

go test ./lib/trie

Issues

• Integrate scale package into lib/trie #1750

Primary Reviewer

• @noot

[codecov]

Codecov Report

Merging #1804 (576efeb) into development (9b2f41e) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           development    #1804      +/-   ##
===============================================
- Coverage        59.57%   59.51%   -0.07%     
===============================================
  Files              187      186       -1     
  Lines            19782    19724      -58     
===============================================
- Hits             11785    11738      -47     
+ Misses            5983     5982       -1     
+ Partials          2014     2004      -10     

Flag	Coverage Δ
unit-tests	59.51% <100.00%> (-0.07%)	⬇️

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

Impacted Files	Coverage Δ
lib/trie/hash.go	77.17% <100.00%> (-0.96%)	⬇️
lib/trie/node.go	78.63% <100.00%> (ø)
lib/trie/print.go	70.96% <100.00%> (ø)
lib/trie/trie.go	92.66% <100.00%> (ø)
dot/state/block_notify.go	75.30% <0.00%> (-9.88%)	⬇️
dot/network/test_helpers.go	78.78% <0.00%> (-4.05%)	⬇️
lib/babe/epoch.go	64.51% <0.00%> (-2.16%)	⬇️
lib/blocktree/blocktree.go	55.61% <0.00%> (-1.13%)	⬇️
dot/network/sync.go	64.22% <0.00%> (-0.40%)	⬇️
lib/babe/babe.go	57.41% <0.00%> (+1.14%)	⬆️

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[jimjbrettj]

Looks good!

[edwardmack]

great work, lgtm.

[github-actions]

🎉 This PR is included in version 0.6.0 🎉

The release is available on GitHub release

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