feat: existential deposits in asset registry

[enthusiastmartin]

No description provided.

[codecov]

Codecov Report

Merging #146 (bc88cd4) into launch-review (71ded59) will increase coverage by 0.01%.
The diff coverage is 82.05%.

❗ Current head bc88cd4 differs from pull request most recent head dacd57f. Consider uploading reports for the commit dacd57f to get more accurate results

@@                Coverage Diff                @@
##           launch-review     #146      +/-   ##
=================================================
+ Coverage          86.10%   86.12%   +0.01%     
=================================================
  Files                 21       21              
  Lines               2102     2112      +10     
=================================================
+ Hits                1810     1819       +9     
- Misses               292      293       +1     

Impacted Files	Coverage Δ
pallets/duster/src/lib.rs	84.90% <0.00%> (-3.33%)	⬇️
primitives/src/traits.rs	71.42% <50.00%> (ø)
pallets/asset-registry/src/lib.rs	91.07% <85.00%> (+1.44%)	⬆️
pallets/asset-registry/src/benchmarking.rs	100.00% <100.00%> (ø)
pallets/xyk/src/lib.rs	83.71% <100.00%> (ø)
pallets/lbp/src/lib.rs	87.86% <0.00%> (-0.18%)	⬇️

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