[API] Added getParams API at governance and klay namespaces

[hyunsooda]

Proposed changes

• Following updates for the newly added API getParams (See: Add klay, governance APIs klaytn#1783)
• Version update from 1.9.1 to 1.10.1 in package-lock.json.

Do not forget to update caver-java as well.

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• New feature or enhancement
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Further comments

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[CLAassistant]

All committers have signed the CLA.

[nohkwak]

@hyunsooda

In the document above shared by @ian, it is written that both getItemAt and getParams should be supported in version 1.10.2.
Please, keep getItemAt supported until the next version and check CLA.

[nohkwak]

When I reviewed it again, I saw that both APIs are still supported, only the test cases are missing.
Please ignore the comments above.

In the PR title, it seems to be applied to the klay namespace as well,
It is not added to the packages/caver-rpc/src/klay.js file.
Please confirm.

Thank you.

[hyunsooda]

Added missing klay namespace in JS binding. Thanks.

[nohkwak]

LGTM