refactor: remove peerDependency of toolkit

[zhangyouxin]

Description

This PR removes peerDependency of toolkit package

Type of change

• Refactor (non-breaking change)

How Has This Been Tested?

• Smoke test to make sure base Normalizers using normalizeHexNumber works

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[codecov]

Codecov Report

Merging #560 (5ff0e0b) into develop (ed5dc56) will increase coverage by 0.31%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #560      +/-   ##
===========================================
+ Coverage    86.65%   86.96%   +0.31%     
===========================================
  Files          115      115              
  Lines        23102    23102              
  Branches      2333     2358      +25     
===========================================
+ Hits         20019    20091      +72     
+ Misses        3040     2967      -73     
- Partials        43       44       +1     

Files	Coverage Δ
packages/toolkit/src/normalizers.js	38.96% <100.00%> (+12.66%)	⬆️

... and 2 files with indirect coverage changes

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[homura]

We don't need to bump the version manually, can you follow the For Contributor section to add the changeset?