Option to use npms.io as a handler for NpmSearch

[dentuzhik]

npms is faster and defaults to Github instead on npm registry. Although vim script skills are completely nonexistent, will you accept a PR in case if I'll figure out how do that?

https://npms.io/search?q=redux

[chemzqm]

will you accept a PR in case if I'll figure out how do that?

Yes