Update dependency nyc to v15.1.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
nyc (source)	devDependencies	minor	15.0.1 -> 15.1.0

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Release Notes

istanbuljs/nyc

v15.1.0

Compare Source

Features

• experimental: Support using --all with node.js ESM (#​1320) (992359a)

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Renovate configuration

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[coveralls]

Coverage remained the same at 100.0% when pulling a61180e on renovate/nyc-15.x into b3561d9 on master.

[codecov-commenter]

Codecov Report

Merging #25 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #25   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           24        24           
  Lines           84        84           
=========================================
  Hits            84        84           

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