Update dependency np to v6.4.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
np	devDependencies	minor	6.3.2 -> 6.4.0

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Release Notes

sindresorhus/np

v6.4.0

Compare Source

• Add --test-script flag to run custom tests before publish (#​557) 0c46a2f
• Add support for --no-2fa flag (#​559) 0638d27
• Add support for specifying release branch (#​558) b8b1976

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[codeclimate]

Code Climate has analyzed commit 180bccc and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 99.7% (0.0% change).

View more on Code Climate.

[coveralls]

Coverage remained the same at 95.059% when pulling 180bccc on renovate/np-6.x into cf06066 on master.

[codecov-commenter]

Codecov Report

Merging #114 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #114   +/-   ##
=======================================
  Coverage   99.72%   99.72%           
=======================================
  Files          10       10           
  Lines         361      361           
=======================================
  Hits          360      360           
  Misses          1        1           

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