Implement EIP1559 support

[ludowkm]

EIP-1559 is applied for a long time and most of web3 libs are supported it.

This PR is aim to solve this missing thing, it's enough to use EIP-1559 in web3dart.

[ludowkm]

#184

[ludowkm]

@simolus3 Can you please take a look on it to support this EIP?

[codecov-commenter]

Codecov Report

Merging #215 (493b859) into master (4f2bed8) will decrease coverage by 2.40%.
The diff coverage is 61.70%.

❗ Current head 493b859 differs from pull request most recent head 693bc79. Consider uploading reports for the commit 693bc79 to get more accurate results

@@            Coverage Diff             @@
##           master     #215      +/-   ##
==========================================
- Coverage   71.22%   68.82%   -2.41%     
==========================================
  Files          52       53       +1     
  Lines        2092     2181      +89     
==========================================
+ Hits         1490     1501      +11     
- Misses        602      680      +78     

Impacted Files	Coverage Δ
lib/src/core/block_information.dart	0.00% <0.00%> (ø)
lib/src/core/client.dart	5.40% <0.00%> (-14.45%)	⬇️
lib/src/core/transaction_information.dart	48.10% <28.57%> (-1.22%)	⬇️
lib/src/core/transaction.dart	50.00% <60.00%> (+19.23%)	⬆️
lib/src/core/transaction_signer.dart	75.00% <73.68%> (+7.50%)	⬆️
lib/src/credentials/credentials.dart	64.10% <100.00%> (+1.94%)	⬆️
test/core/sign_transaction_test.dart	100.00% <100.00%> (ø)
lib/src/contracts/generated_contract.dart	0.00% <0.00%> (-42.86%)	⬇️
test/infura_integration_test.dart	53.33% <0.00%> (-40.01%)	⬇️
lib/src/generated/erc20.g.dart	0.00% <0.00%> (-15.52%)	⬇️
... and 7 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4f2bed8...693bc79. Read the comment docs.

[simolus3]

Thank you! I have published this as 2.3.2