refactor: replace AbstractFactory with CoinFactory

[faustbrian]

Resolves #245

import { CoinFactory } from "@arkecosystem/platform-sdk";
import { Services } from "@arkecosystem/platform-sdk-ark";

await CoinFactory.construct(ARK, { ... });

Still pondering if there is a better way for the arguments to combine them into a single object.

[codecov]

Codecov Report

Merging #247 into master will decrease coverage by 2.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
- Coverage   83.30%   81.13%   -2.18%     
==========================================
  Files          25       25              
  Lines         707      774      +67     
  Branches       78      100      +22     
==========================================
+ Hits          589      628      +39     
- Misses        116      144      +28     
  Partials        2        2              

Impacted Files	Coverage Δ
src/services/link.ts	0.00% <0.00%> (-62.50%)	⬇️
src/services/transaction.ts	56.73% <0.00%> (-8.13%)	⬇️
src/services/fee.ts	88.23% <0.00%> (-5.89%)	⬇️
src/services/peer.ts	94.73% <0.00%> (-1.32%)	⬇️
src/factory.ts
src/services/identity/utils.ts	100.00% <0.00%> (ø)
src/services/client.ts	86.53% <0.00%> (+0.10%)	⬆️
src/dto/transaction.ts	91.30% <0.00%> (+0.19%)	⬆️
src/services/identity/private-key.ts	92.85% <0.00%> (+0.54%)	⬆️
src/services/identity/public-key.ts	94.73% <0.00%> (+1.40%)	⬆️
... and 5 more

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