Fixed encodeParameters to handle a fixed length tuple array

[jimni1222]

Description

This PR introduces that modify the web3.eth.abi.encodeParameters logic to handle a fixed length tuple array.

I am a developer developing caver-js, a project that forked web3.js.
I was testing the encodeParameters function and found a bug that couldn't handle an array of fixed length tuples.

The problem was with coder.type.replace('[]','').
If the length is not fixed (i.e. tuple(string,string)[]), the coder.type.replace('[]','') can processe normally by obtaining the coder for the inner element as a tuple type.
However, if the length was fixed (i.e. tuple(string,string)[3]), coder.type.replace('[]','') cannot process.

To solve this, change to replace when n numbers inside [] parentheses come.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run dtslint with success and extended the tests and types if necessary.
• I ran npm run test:unit with success.
• I ran npm run test:cov and my test cases cover all the lines and branches of the added code.
• I ran npm run build and tested dist/web3.min.js in a browser.
• I have tested my code on the live network.
• I have checked the Deploy Preview and it looks correct.
• I have updated the CHANGELOG.md file in the root folder.

[coveralls]

Pull Request Test Coverage Report for Build 765430808

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 12 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.004%) to 73.706%

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Files with Coverage Reduction	New Missed Lines	%
packages/web3-eth-abi/lib/index.js	12	89.92%

Totals
Change from base Build 720288779:	0.004%
Covered Lines:	3278
Relevant Lines:	4209

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💛 - Coveralls

[github-actions]

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