more compatible node_modules ignore for npm publish

[leavesster]

Reasons for making this change:

git will ignore node_modules directory in any nest directories whether we write node_modules/ or node_module. However npm only ignore node_modules in subdirectories when we write node_modules in .gitignore if .npmignore is not exist.

# when we write `node_modules/` in .gitignore
npm publish

# upload node_modules/xx.js
npm notice aa/node_modules/xx.js

# when we write `node_modules` in .gitignore
npm publish

# will not upload aa/node_modules/xx.js

[github-actions[bot]]

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