chore: Upgrade node version

[cyaiox]

This PR upgrades the docker node version from 14 to 18

[coveralls]

Pull Request Test Coverage Report for Build 4769785279

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 68.709%

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Totals
Change from base Build 4768742614:	0.0%
Covered Lines:	2699
Relevant Lines:	3789

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 4769785279

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 68.682%

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Files with Coverage Reduction	New Missed Lines	%
src/LAND/index.ts	1	100.0%
src/NFT/index.ts	1	100.0%
<!--	Total:	2		-->

Totals
Change from base Build 4768742614:	-0.03%
Covered Lines:	2699
Relevant Lines:	3791

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💛 - Coveralls