perf(crypto): replace bs58check with bstring

[spkjp]

Replaces bs58check which is a pure JS implementation with bstring which ships a native base58 implemenation.

It is about twice as fast:

    ✓  bstring.base58.decode x 439,740 ops/sec ±1.76% (83 runs sampled)
    ✓  bs58check.decode x 223,122 ops/sec ±1.42% (82 runs sampled)
    ✓  bstring.base58.encode x 315,189 ops/sec ±1.10% (88 runs sampled)
    ✓  bs58check.encode x 162,822 ops/sec ±1.63% (92 runs sampled)

What kind of change does this PR introduce?

• Bugfix
• Feature
• Refactor
• Performance
• Tests
• Build
• Documentation
• Code style update
• Continuous Integration
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR release a new version?

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• It's submitted to the develop branch, not the master branch
• All tests are passing
• New/updated tests are included

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

[codecov-io]

Codecov Report

Merging #2673 into 2.6 will increase coverage by 0.18%.
The diff coverage is 83.87%.

@@            Coverage Diff             @@
##              2.6    #2673      +/-   ##
==========================================
+ Coverage   64.69%   64.88%   +0.18%     
==========================================
  Files         378      362      -16     
  Lines        8328     8201     -127     
  Branches      421      418       -3     
==========================================
- Hits         5388     5321      -67     
+ Misses       2899     2841      -58     
+ Partials       41       39       -2

Impacted Files	Coverage Δ
packages/crypto/src/identities/address.ts	100% <100%> (ø)	⬆️
packages/crypto/src/transactions/types/transfer.ts	100% <100%> (ø)	⬆️
packages/crypto/src/transactions/serializer.ts	89.16% <100%> (-0.09%)	⬇️
packages/crypto/src/transactions/types/ipfs.ts	100% <100%> (ø)	⬆️
packages/crypto/src/crypto/bip38.ts	97.34% <100%> (-2.66%)	⬇️
...crypto/src/transactions/types/timelock-transfer.ts	42.85% <33.33%> (ø)	⬆️
packages/core-transactions/src/utils.ts	66.66% <50%> (-8.34%)	⬇️
...ges/crypto/src/transactions/types/multi-payment.ts	40.9% <50%> (ø)	⬆️
packages/core-api/src/formats.ts	44.44% <50%> (ø)	⬆️
... and 16 more

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