update sublibrary elliptic for CVE-2020-13822

[cokia]

Description

about #3729 issue.

update sub library "elliptic" and depth under 13 level.

for more information of vlun, please refer to "GHSA-vh7m-p724-62c2"

Type of change

• Bug fix (non-breaking change which fixes an issue)

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]

Coverage increased (+2.3%) to 80.373% when pulling db0b2c0 on cokia:1.x into 4615f2d on ethereum:1.x.

[GregTheGreek]

This should probably affect the package.json as well?

[frankiebee]

thanks for the sub dep bump

[GregTheGreek]

@cokia can you bump the package-lock we want to make a release :)

[github-actions]

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